21157500

素因数分解:

$2^2\times 3^1\times 5^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:78

約数の個数: 240

約数和(自身を含む): 78374912

約数和(自身を除く): 57217412

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 25, 26, 28, 30, 31, 35, 39, 42, 50, 52, 60, 62, 65, 70, 75, 78, 84, 91, 93, 100, 105, 124, 125, 130, 140, 150, 155, 156, 175, 182, 186, 195, 210, 217, 250, 260, 273, 300, 310, 325, 350, 364, 372, 375, 390, 403, 420, 434, 455, 465, 500, 525, 546, 620, 625, 650, 651, 700, 750, 775, 780, 806, 868, 875, 910, 930, 975, 1050, 1085, 1092, 1209, 1250, 1300, 1302, 1365, 1500, 1550, 1612, 1625, 1750, 1820, 1860, 1875, 1950, 2015, 2100, 2170, 2275, 2325, 2418, 2500, 2604, 2625, 2730, 2821, 3100, 3250, 3255, 3500, 3750, 3875, 3900, 4030, 4340, 4375, 4550, 4650, 4836, 4875, 5250, 5425, 5460, 5642, 6045, 6500, 6510, 6825, 7500, 7750, 8060, 8125, 8463, 8750, 9100, 9300, 9750, 10075, 10500, 10850, 11284, 11375, 11625, 12090, 13020, 13125, 13650, 14105, 15500, 16250, 16275, 16926, 17500, 19375, 19500, 20150, 21700, 22750, 23250, 24180, 24375, 26250, 27125, 27300, 28210, 30225, 32500, 32550, 33852, 34125, 38750, 40300, 42315, 45500, 46500, 48750, 50375, 52500, 54250, 56420, 56875, 58125, 60450, 65100, 68250, 70525, 77500, 81375, 84630, 97500, 100750, 108500, 113750, 116250, 120900, 135625, 136500, 141050, 151125, 162750, 169260, 170625, 201500, 211575, 227500, 232500, 251875, 271250, 282100, 302250, 325500, 341250, 352625, 406875, 423150, 503750, 542500, 604500, 682500, 705250, 755625, 813750, 846300, 1007500, 1057875, 1410500, 1511250, 1627500, 1763125, 2115750, 3022500, 3526250, 4231500, 5289375, 7052500, 10578750, 21157500]

約数ペア:

[(1, 21157500), (2, 10578750), (3, 7052500), (4, 5289375), (5, 4231500), (6, 3526250), (7, 3022500), (10, 2115750), (12, 1763125), (13, 1627500), (14, 1511250), (15, 1410500), (20, 1057875), (21, 1007500), (25, 846300), (26, 813750), (28, 755625), (30, 705250), (31, 682500), (35, 604500), (39, 542500), (42, 503750), (50, 423150), (52, 406875), (60, 352625), (62, 341250), (65, 325500), (70, 302250), (75, 282100), (78, 271250), (84, 251875), (91, 232500), (93, 227500), (100, 211575), (105, 201500), (124, 170625), (125, 169260), (130, 162750), (140, 151125), (150, 141050), (155, 136500), (156, 135625), (175, 120900), (182, 116250), (186, 113750), (195, 108500), (210, 100750), (217, 97500), (250, 84630), (260, 81375), (273, 77500), (300, 70525), (310, 68250), (325, 65100), (350, 60450), (364, 58125), (372, 56875), (375, 56420), (390, 54250), (403, 52500), (420, 50375), (434, 48750), (455, 46500), (465, 45500), (500, 42315), (525, 40300), (546, 38750), (620, 34125), (625, 33852), (650, 32550), (651, 32500), (700, 30225), (750, 28210), (775, 27300), (780, 27125), (806, 26250), (868, 24375), (875, 24180), (910, 23250), (930, 22750), (975, 21700), (1050, 20150), (1085, 19500), (1092, 19375), (1209, 17500), (1250, 16926), (1300, 16275), (1302, 16250), (1365, 15500), (1500, 14105), (1550, 13650), (1612, 13125), (1625, 13020), (1750, 12090), (1820, 11625), (1860, 11375), (1875, 11284), (1950, 10850), (2015, 10500), (2100, 10075), (2170, 9750), (2275, 9300), (2325, 9100), (2418, 8750), (2500, 8463), (2604, 8125), (2625, 8060), (2730, 7750), (2821, 7500), (3100, 6825), (3250, 6510), (3255, 6500), (3500, 6045), (3750, 5642), (3875, 5460), (3900, 5425), (4030, 5250), (4340, 4875), (4375, 4836), (4550, 4650)]