20218389425

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{215261}}^1$

素因数の和:215318

約数の個数: 36

約数和(自身を含む): 28681078356

約数和(自身を除く): 8462688931

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 289, 325, 425, 1105, 1445, 3757, 5525, 7225, 18785, 93925, 215261, 1076305, 2798393, 3659437, 5381525, 13991965, 18297185, 47572681, 62210429, 69959825, 91485925, 237863405, 311052145, 808735577, 1189317025, 1555260725, 4043677885, 20218389425]

約数ペア:

[(1, 20218389425), (5, 4043677885), (13, 1555260725), (17, 1189317025), (25, 808735577), (65, 311052145), (85, 237863405), (221, 91485925), (289, 69959825), (325, 62210429), (425, 47572681), (1105, 18297185), (1445, 13991965), (3757, 5381525), (5525, 3659437), (7225, 2798393), (18785, 1076305), (93925, 215261)]