21512725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1789}}^1$

素因数の和:1849

約数の個数: 24

約数和(自身を含む): 29520680

約数和(自身を除く): 8007955

約数列:

[1, 5, 13, 25, 37, 65, 185, 325, 481, 925, 1789, 2405, 8945, 12025, 23257, 44725, 66193, 116285, 330965, 581425, 860509, 1654825, 4302545, 21512725]

約数ペア:

[(1, 21512725), (5, 4302545), (13, 1654825), (25, 860509), (37, 581425), (65, 330965), (185, 116285), (325, 66193), (481, 44725), (925, 23257), (1789, 12025), (2405, 8945)]