20512355900

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{1321}}^1\times {\mathrm{5009}}^1$

素因数の和:6375

約数の個数: 72

約数和(自身を含む): 45991639680

約数和(自身を除く): 25479283780

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 155, 310, 620, 775, 1321, 1550, 2642, 3100, 5009, 5284, 6605, 10018, 13210, 20036, 25045, 26420, 33025, 40951, 50090, 66050, 81902, 100180, 125225, 132100, 155279, 163804, 204755, 250450, 310558, 409510, 500900, 621116, 776395, 819020, 1023775, 1552790, 2047550, 3105580, 3881975, 4095100, 6616889, 7763950, 13233778, 15527900, 26467556, 33084445, 66168890, 132337780, 165422225, 205123559, 330844450, 410247118, 661688900, 820494236, 1025617795, 2051235590, 4102471180, 5128088975, 10256177950, 20512355900]

約数ペア:

[(1, 20512355900), (2, 10256177950), (4, 5128088975), (5, 4102471180), (10, 2051235590), (20, 1025617795), (25, 820494236), (31, 661688900), (50, 410247118), (62, 330844450), (100, 205123559), (124, 165422225), (155, 132337780), (310, 66168890), (620, 33084445), (775, 26467556), (1321, 15527900), (1550, 13233778), (2642, 7763950), (3100, 6616889), (5009, 4095100), (5284, 3881975), (6605, 3105580), (10018, 2047550), (13210, 1552790), (20036, 1023775), (25045, 819020), (26420, 776395), (33025, 621116), (40951, 500900), (50090, 409510), (66050, 310558), (81902, 250450), (100180, 204755), (125225, 163804), (132100, 155279)]