20649975

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{11971}}^1$

素因数の和:12007

約数の個数: 24

約数和(自身を含む): 35628672

約数和(自身を除く): 14978697

約数列:

[1, 3, 5, 15, 23, 25, 69, 75, 115, 345, 575, 1725, 11971, 35913, 59855, 179565, 275333, 299275, 825999, 897825, 1376665, 4129995, 6883325, 20649975]

約数ペア:

[(1, 20649975), (3, 6883325), (5, 4129995), (15, 1376665), (23, 897825), (25, 825999), (69, 299275), (75, 275333), (115, 179565), (345, 59855), (575, 35913), (1725, 11971)]