20398000

素因数分解:

$2^4\times 5^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:108

約数の個数: 160

約数和(自身を含む): 59424768

約数和(自身を除く): 39026768

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 31, 35, 40, 47, 50, 56, 62, 70, 80, 94, 100, 112, 124, 125, 140, 155, 175, 188, 200, 217, 235, 248, 250, 280, 310, 329, 350, 376, 400, 434, 470, 496, 500, 560, 620, 658, 700, 752, 775, 868, 875, 940, 1000, 1085, 1175, 1240, 1316, 1400, 1457, 1550, 1645, 1736, 1750, 1880, 2000, 2170, 2350, 2480, 2632, 2800, 2914, 3100, 3290, 3472, 3500, 3760, 3875, 4340, 4700, 5264, 5425, 5828, 5875, 6200, 6580, 7000, 7285, 7750, 8225, 8680, 9400, 10199, 10850, 11656, 11750, 12400, 13160, 14000, 14570, 15500, 16450, 17360, 18800, 20398, 21700, 23312, 23500, 26320, 27125, 29140, 31000, 32900, 36425, 40796, 41125, 43400, 47000, 50995, 54250, 58280, 62000, 65800, 72850, 81592, 82250, 86800, 94000, 101990, 108500, 116560, 131600, 145700, 163184, 164500, 182125, 203980, 217000, 254975, 291400, 329000, 364250, 407960, 434000, 509950, 582800, 658000, 728500, 815920, 1019900, 1274875, 1457000, 2039800, 2549750, 2914000, 4079600, 5099500, 10199000, 20398000]

約数ペア:

[(1, 20398000), (2, 10199000), (4, 5099500), (5, 4079600), (7, 2914000), (8, 2549750), (10, 2039800), (14, 1457000), (16, 1274875), (20, 1019900), (25, 815920), (28, 728500), (31, 658000), (35, 582800), (40, 509950), (47, 434000), (50, 407960), (56, 364250), (62, 329000), (70, 291400), (80, 254975), (94, 217000), (100, 203980), (112, 182125), (124, 164500), (125, 163184), (140, 145700), (155, 131600), (175, 116560), (188, 108500), (200, 101990), (217, 94000), (235, 86800), (248, 82250), (250, 81592), (280, 72850), (310, 65800), (329, 62000), (350, 58280), (376, 54250), (400, 50995), (434, 47000), (470, 43400), (496, 41125), (500, 40796), (560, 36425), (620, 32900), (658, 31000), (700, 29140), (752, 27125), (775, 26320), (868, 23500), (875, 23312), (940, 21700), (1000, 20398), (1085, 18800), (1175, 17360), (1240, 16450), (1316, 15500), (1400, 14570), (1457, 14000), (1550, 13160), (1645, 12400), (1736, 11750), (1750, 11656), (1880, 10850), (2000, 10199), (2170, 9400), (2350, 8680), (2480, 8225), (2632, 7750), (2800, 7285), (2914, 7000), (3100, 6580), (3290, 6200), (3472, 5875), (3500, 5828), (3760, 5425), (3875, 5264), (4340, 4700)]