20310875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{431}}^1$

素因数の和:488

約数の個数: 32

約数和(自身を含む): 28304640

約数和(自身を除く): 7993765

約数列:

[1, 5, 13, 25, 29, 65, 125, 145, 325, 377, 431, 725, 1625, 1885, 2155, 3625, 5603, 9425, 10775, 12499, 28015, 47125, 53875, 62495, 140075, 162487, 312475, 700375, 812435, 1562375, 4062175, 20310875]

約数ペア:

[(1, 20310875), (5, 4062175), (13, 1562375), (25, 812435), (29, 700375), (65, 312475), (125, 162487), (145, 140075), (325, 62495), (377, 53875), (431, 47125), (725, 28015), (1625, 12499), (1885, 10775), (2155, 9425), (3625, 5603)]