20139925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2053

約数の個数: 24

約数和(自身を含む): 27776000

約数和(自身を除く): 7636075

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 1999, 2015, 9995, 10075, 25987, 49975, 61969, 129935, 309845, 649675, 805597, 1549225, 4027985, 20139925]

約数ペア:

[(1, 20139925), (5, 4027985), (13, 1549225), (25, 805597), (31, 649675), (65, 309845), (155, 129935), (325, 61969), (403, 49975), (775, 25987), (1999, 10075), (2015, 9995)]