21529820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4871}}^1$

素因数の和:4910

約数の個数: 48

約数和(自身を含む): 51565248

約数和(自身を除く): 30035428

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4871, 9742, 19484, 24355, 48710, 63323, 82807, 97420, 126646, 165614, 253292, 316615, 331228, 414035, 633230, 828070, 1076491, 1266460, 1656140, 2152982, 4305964, 5382455, 10764910, 21529820]

約数ペア:

[(1, 21529820), (2, 10764910), (4, 5382455), (5, 4305964), (10, 2152982), (13, 1656140), (17, 1266460), (20, 1076491), (26, 828070), (34, 633230), (52, 414035), (65, 331228), (68, 316615), (85, 253292), (130, 165614), (170, 126646), (221, 97420), (260, 82807), (340, 63323), (442, 48710), (884, 24355), (1105, 19484), (2210, 9742), (4420, 4871)]