638755000

素因数分解:

$2^3\times 5^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{317}}^1$

素因数の和:387

約数の個数: 160

約数和(自身を含む): 1668965760

約数和(自身を除く): 1030210760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 31, 40, 50, 52, 62, 65, 100, 104, 124, 125, 130, 155, 200, 248, 250, 260, 310, 317, 325, 403, 500, 520, 620, 625, 634, 650, 775, 806, 1000, 1240, 1250, 1268, 1300, 1550, 1585, 1612, 1625, 2015, 2500, 2536, 2600, 3100, 3170, 3224, 3250, 3875, 4030, 4121, 5000, 6200, 6340, 6500, 7750, 7925, 8060, 8125, 8242, 9827, 10075, 12680, 13000, 15500, 15850, 16120, 16250, 16484, 19375, 19654, 20150, 20605, 31000, 31700, 32500, 32968, 38750, 39308, 39625, 40300, 41210, 49135, 50375, 63400, 65000, 77500, 78616, 79250, 80600, 82420, 98270, 100750, 103025, 127751, 155000, 158500, 164840, 196540, 198125, 201500, 206050, 245675, 251875, 255502, 317000, 393080, 396250, 403000, 412100, 491350, 503750, 511004, 515125, 638755, 792500, 824200, 982700, 1007500, 1022008, 1030250, 1228375, 1277510, 1585000, 1965400, 2015000, 2060500, 2456750, 2555020, 2575625, 3193775, 4121000, 4913500, 5110040, 5151250, 6141875, 6387550, 9827000, 10302500, 12283750, 12775100, 15968875, 20605000, 24567500, 25550200, 31937750, 49135000, 63875500, 79844375, 127751000, 159688750, 319377500, 638755000]

約数ペア:

[(1, 638755000), (2, 319377500), (4, 159688750), (5, 127751000), (8, 79844375), (10, 63875500), (13, 49135000), (20, 31937750), (25, 25550200), (26, 24567500), (31, 20605000), (40, 15968875), (50, 12775100), (52, 12283750), (62, 10302500), (65, 9827000), (100, 6387550), (104, 6141875), (124, 5151250), (125, 5110040), (130, 4913500), (155, 4121000), (200, 3193775), (248, 2575625), (250, 2555020), (260, 2456750), (310, 2060500), (317, 2015000), (325, 1965400), (403, 1585000), (500, 1277510), (520, 1228375), (620, 1030250), (625, 1022008), (634, 1007500), (650, 982700), (775, 824200), (806, 792500), (1000, 638755), (1240, 515125), (1250, 511004), (1268, 503750), (1300, 491350), (1550, 412100), (1585, 403000), (1612, 396250), (1625, 393080), (2015, 317000), (2500, 255502), (2536, 251875), (2600, 245675), (3100, 206050), (3170, 201500), (3224, 198125), (3250, 196540), (3875, 164840), (4030, 158500), (4121, 155000), (5000, 127751), (6200, 103025), (6340, 100750), (6500, 98270), (7750, 82420), (7925, 80600), (8060, 79250), (8125, 78616), (8242, 77500), (9827, 65000), (10075, 63400), (12680, 50375), (13000, 49135), (15500, 41210), (15850, 40300), (16120, 39625), (16250, 39308), (16484, 38750), (19375, 32968), (19654, 32500), (20150, 31700), (20605, 31000)]