20646925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 30279312

約数和(自身を除く): 9632387

約数列:

[1, 5, 13, 17, 25, 37, 65, 85, 101, 185, 221, 325, 425, 481, 505, 629, 925, 1105, 1313, 1717, 2405, 2525, 3145, 3737, 5525, 6565, 8177, 8585, 12025, 15725, 18685, 22321, 32825, 40885, 42925, 48581, 63529, 93425, 111605, 204425, 242905, 317645, 558025, 825877, 1214525, 1588225, 4129385, 20646925]

約数ペア:

[(1, 20646925), (5, 4129385), (13, 1588225), (17, 1214525), (25, 825877), (37, 558025), (65, 317645), (85, 242905), (101, 204425), (185, 111605), (221, 93425), (325, 63529), (425, 48581), (481, 42925), (505, 40885), (629, 32825), (925, 22321), (1105, 18685), (1313, 15725), (1717, 12025), (2405, 8585), (2525, 8177), (3145, 6565), (3737, 5525)]