20297225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{173}}^1$

素因数の和:234

約数の個数: 36

約数和(自身を含む): 28771596

約数和(自身を除く): 8474371

約数列:

[1, 5, 13, 19, 25, 65, 95, 173, 247, 325, 361, 475, 865, 1235, 1805, 2249, 3287, 4325, 4693, 6175, 9025, 11245, 16435, 23465, 42731, 56225, 62453, 82175, 117325, 213655, 312265, 811889, 1068275, 1561325, 4059445, 20297225]

約数ペア:

[(1, 20297225), (5, 4059445), (13, 1561325), (19, 1068275), (25, 811889), (65, 312265), (95, 213655), (173, 117325), (247, 82175), (325, 62453), (361, 56225), (475, 42731), (865, 23465), (1235, 16435), (1805, 11245), (2249, 9025), (3287, 6175), (4325, 4693)]