20149025

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{251}}^1$

素因数の和:306

約数の個数: 36

約数和(自身を含む): 28591920

約数和(自身を除く): 8442895

約数列:

[1, 5, 13, 19, 25, 65, 95, 169, 247, 251, 325, 475, 845, 1235, 1255, 3211, 3263, 4225, 4769, 6175, 6275, 16055, 16315, 23845, 42419, 61997, 80275, 81575, 119225, 212095, 309985, 805961, 1060475, 1549925, 4029805, 20149025]

約数ペア:

[(1, 20149025), (5, 4029805), (13, 1549925), (19, 1060475), (25, 805961), (65, 309985), (95, 212095), (169, 119225), (247, 81575), (251, 80275), (325, 61997), (475, 42419), (845, 23845), (1235, 16315), (1255, 16055), (3211, 6275), (3263, 6175), (4225, 4769)]