644800

素因数分解:

$2^6\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:66

約数の個数: 84

約数和(自身を含む): 1763776

約数和(自身を除く): 1118976

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 31, 32, 40, 50, 52, 62, 64, 65, 80, 100, 104, 124, 130, 155, 160, 200, 208, 248, 260, 310, 320, 325, 400, 403, 416, 496, 520, 620, 650, 775, 800, 806, 832, 992, 1040, 1240, 1300, 1550, 1600, 1612, 1984, 2015, 2080, 2480, 2600, 3100, 3224, 4030, 4160, 4960, 5200, 6200, 6448, 8060, 9920, 10075, 10400, 12400, 12896, 16120, 20150, 20800, 24800, 25792, 32240, 40300, 49600, 64480, 80600, 128960, 161200, 322400, 644800]

約数ペア:

[(1, 644800), (2, 322400), (4, 161200), (5, 128960), (8, 80600), (10, 64480), (13, 49600), (16, 40300), (20, 32240), (25, 25792), (26, 24800), (31, 20800), (32, 20150), (40, 16120), (50, 12896), (52, 12400), (62, 10400), (64, 10075), (65, 9920), (80, 8060), (100, 6448), (104, 6200), (124, 5200), (130, 4960), (155, 4160), (160, 4030), (200, 3224), (208, 3100), (248, 2600), (260, 2480), (310, 2080), (320, 2015), (325, 1984), (400, 1612), (403, 1600), (416, 1550), (496, 1300), (520, 1240), (620, 1040), (650, 992), (775, 832), (800, 806)]