638479920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{204641}}^1$

素因数の和:204670

約数の個数: 80

約数和(自身を含む): 2131551072

約数和(自身を除く): 1493071152

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 204641, 409282, 613923, 818564, 1023205, 1227846, 1637128, 2046410, 2455692, 2660333, 3069615, 3274256, 4092820, 4911384, 5320666, 6139230, 7980999, 8185640, 9822768, 10641332, 12278460, 13301665, 15961998, 16371280, 21282664, 24556920, 26603330, 31923996, 39904995, 42565328, 49113840, 53206660, 63847992, 79809990, 106413320, 127695984, 159619980, 212826640, 319239960, 638479920]

約数ペア:

[(1, 638479920), (2, 319239960), (3, 212826640), (4, 159619980), (5, 127695984), (6, 106413320), (8, 79809990), (10, 63847992), (12, 53206660), (13, 49113840), (15, 42565328), (16, 39904995), (20, 31923996), (24, 26603330), (26, 24556920), (30, 21282664), (39, 16371280), (40, 15961998), (48, 13301665), (52, 12278460), (60, 10641332), (65, 9822768), (78, 8185640), (80, 7980999), (104, 6139230), (120, 5320666), (130, 4911384), (156, 4092820), (195, 3274256), (208, 3069615), (240, 2660333), (260, 2455692), (312, 2046410), (390, 1637128), (520, 1227846), (624, 1023205), (780, 818564), (1040, 613923), (1560, 409282), (3120, 204641)]