20455240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{283}}^1$

素因数の和:446

約数の個数: 64

約数和(自身を含む): 50097600

約数和(自身を除く): 29642360

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 139, 260, 278, 283, 520, 556, 566, 695, 1112, 1132, 1390, 1415, 1807, 2264, 2780, 2830, 3614, 3679, 5560, 5660, 7228, 7358, 9035, 11320, 14456, 14716, 18070, 18395, 29432, 36140, 36790, 39337, 72280, 73580, 78674, 147160, 157348, 196685, 314696, 393370, 511381, 786740, 1022762, 1573480, 2045524, 2556905, 4091048, 5113810, 10227620, 20455240]

約数ペア:

[(1, 20455240), (2, 10227620), (4, 5113810), (5, 4091048), (8, 2556905), (10, 2045524), (13, 1573480), (20, 1022762), (26, 786740), (40, 511381), (52, 393370), (65, 314696), (104, 196685), (130, 157348), (139, 147160), (260, 78674), (278, 73580), (283, 72280), (520, 39337), (556, 36790), (566, 36140), (695, 29432), (1112, 18395), (1132, 18070), (1390, 14716), (1415, 14456), (1807, 11320), (2264, 9035), (2780, 7358), (2830, 7228), (3614, 5660), (3679, 5560)]