21288475

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2113}}^1$

素因数の和:2167

約数の個数: 24

約数和(自身を含む): 29359232

約数和(自身を除く): 8070757

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 2015, 2113, 10075, 10565, 27469, 52825, 65503, 137345, 327515, 686725, 851539, 1637575, 4257695, 21288475]

約数ペア:

[(1, 21288475), (5, 4257695), (13, 1637575), (25, 851539), (31, 686725), (65, 327515), (155, 137345), (325, 65503), (403, 52825), (775, 27469), (2015, 10565), (2113, 10075)]