21620625

素因数分解:

$3^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{887}}^1$

素因数の和:923

約数の個数: 40

約数和(自身を含む): 38837568

約数和(自身を除く): 17216943

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 195, 325, 375, 625, 887, 975, 1625, 1875, 2661, 4435, 4875, 8125, 11531, 13305, 22175, 24375, 34593, 57655, 66525, 110875, 172965, 288275, 332625, 554375, 864825, 1441375, 1663125, 4324125, 7206875, 21620625]

約数ペア:

[(1, 21620625), (3, 7206875), (5, 4324125), (13, 1663125), (15, 1441375), (25, 864825), (39, 554375), (65, 332625), (75, 288275), (125, 172965), (195, 110875), (325, 66525), (375, 57655), (625, 34593), (887, 24375), (975, 22175), (1625, 13305), (1875, 11531), (2661, 8125), (4435, 4875)]