20901825

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{577}}^1$

素因数の和:623

約数の個数: 72

約数和(自身を含む): 44723328

約数和(自身を除く): 23821503

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 25, 35, 45, 63, 69, 75, 105, 115, 161, 175, 207, 225, 315, 345, 483, 525, 575, 577, 805, 1035, 1449, 1575, 1725, 1731, 2415, 2885, 4025, 4039, 5175, 5193, 7245, 8655, 12075, 12117, 13271, 14425, 20195, 25965, 36225, 36351, 39813, 43275, 60585, 66355, 92897, 100975, 119439, 129825, 181755, 199065, 278691, 302925, 331775, 464485, 597195, 836073, 908775, 995325, 1393455, 2322425, 2985975, 4180365, 6967275, 20901825]

約数ペア:

[(1, 20901825), (3, 6967275), (5, 4180365), (7, 2985975), (9, 2322425), (15, 1393455), (21, 995325), (23, 908775), (25, 836073), (35, 597195), (45, 464485), (63, 331775), (69, 302925), (75, 278691), (105, 199065), (115, 181755), (161, 129825), (175, 119439), (207, 100975), (225, 92897), (315, 66355), (345, 60585), (483, 43275), (525, 39813), (575, 36351), (577, 36225), (805, 25965), (1035, 20195), (1449, 14425), (1575, 13271), (1725, 12117), (1731, 12075), (2415, 8655), (2885, 7245), (4025, 5193), (4039, 5175)]