21009625

素因数分解:

$5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1847}}^1$

素因数の和:1882

約数の個数: 32

約数和(自身を含む): 32288256

約数和(自身を除く): 11278631

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 125, 175, 325, 455, 875, 1625, 1847, 2275, 9235, 11375, 12929, 24011, 46175, 64645, 120055, 168077, 230875, 323225, 600275, 840385, 1616125, 3001375, 4201925, 21009625]

約数ペア:

[(1, 21009625), (5, 4201925), (7, 3001375), (13, 1616125), (25, 840385), (35, 600275), (65, 323225), (91, 230875), (125, 168077), (175, 120055), (325, 64645), (455, 46175), (875, 24011), (1625, 12929), (1847, 11375), (2275, 9235)]