20899775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{601}}^1$

素因数の和:731

約数の個数: 24

約数和(自身を含む): 28216944

約数和(自身を除く): 7317169

約数列:

[1, 5, 13, 25, 65, 107, 325, 535, 601, 1391, 2675, 3005, 6955, 7813, 15025, 34775, 39065, 64307, 195325, 321535, 835991, 1607675, 4179955, 20899775]

約数ペア:

[(1, 20899775), (5, 4179955), (13, 1607675), (25, 835991), (65, 321535), (107, 195325), (325, 64307), (535, 39065), (601, 34775), (1391, 15025), (2675, 7813), (3005, 6955)]