21711625

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{431}}^1$

素因数の和:490

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 8479991

約数列:

[1, 5, 13, 25, 31, 65, 125, 155, 325, 403, 431, 775, 1625, 2015, 2155, 3875, 5603, 10075, 10775, 13361, 28015, 50375, 53875, 66805, 140075, 173693, 334025, 700375, 868465, 1670125, 4342325, 21711625]

約数ペア:

[(1, 21711625), (5, 4342325), (13, 1670125), (25, 868465), (31, 700375), (65, 334025), (125, 173693), (155, 140075), (325, 66805), (403, 53875), (431, 50375), (775, 28015), (1625, 13361), (2015, 10775), (2155, 10075), (3875, 5603)]