21191690

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1$

素因数の和:303

約数の個数: 64

約数和(自身を含む): 44706816

約数和(自身を除く): 23515126

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 43, 65, 85, 86, 130, 170, 215, 221, 223, 430, 442, 446, 559, 731, 1105, 1115, 1118, 1462, 2210, 2230, 2795, 2899, 3655, 3791, 5590, 5798, 7310, 7582, 9503, 9589, 14495, 18955, 19006, 19178, 28990, 37910, 47515, 47945, 49283, 95030, 95890, 98566, 124657, 163013, 246415, 249314, 326026, 492830, 623285, 815065, 1246570, 1630130, 2119169, 4238338, 10595845, 21191690]

約数ペア:

[(1, 21191690), (2, 10595845), (5, 4238338), (10, 2119169), (13, 1630130), (17, 1246570), (26, 815065), (34, 623285), (43, 492830), (65, 326026), (85, 249314), (86, 246415), (130, 163013), (170, 124657), (215, 98566), (221, 95890), (223, 95030), (430, 49283), (442, 47945), (446, 47515), (559, 37910), (731, 28990), (1105, 19178), (1115, 19006), (1118, 18955), (1462, 14495), (2210, 9589), (2230, 9503), (2795, 7582), (2899, 7310), (3655, 5798), (3791, 5590)]