21000474625

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{2579}}^1\times {\mathrm{5011}}^1$

素因数の和:7618

約数の個数: 32

約数和(自身を含む): 28241216640

約数和(自身を除く): 7240742015

約数列:

[1, 5, 13, 25, 65, 125, 325, 1625, 2579, 5011, 12895, 25055, 33527, 64475, 65143, 125275, 167635, 322375, 325715, 626375, 838175, 1628575, 4190875, 8142875, 12923369, 64616845, 168003797, 323084225, 840018985, 1615421125, 4200094925, 21000474625]

約数ペア:

[(1, 21000474625), (5, 4200094925), (13, 1615421125), (25, 840018985), (65, 323084225), (125, 168003797), (325, 64616845), (1625, 12923369), (2579, 8142875), (5011, 4190875), (12895, 1628575), (25055, 838175), (33527, 626375), (64475, 325715), (65143, 322375), (125275, 167635)]