21215428

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{2503}}^1$

素因数の和:2683

約数の個数: 24

約数和(自身を含む): 40244288

約数和(自身を除く): 19028860

約数列:

[1, 2, 4, 13, 26, 52, 163, 326, 652, 2119, 2503, 4238, 5006, 8476, 10012, 32539, 65078, 130156, 407989, 815978, 1631956, 5303857, 10607714, 21215428]

約数ペア:

[(1, 21215428), (2, 10607714), (4, 5303857), (13, 1631956), (26, 815978), (52, 407989), (163, 130156), (326, 65078), (652, 32539), (2119, 10012), (2503, 8476), (4238, 5006)]