20378025

素因数分解:

$3^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{47}}^2$

素因数の和:151

約数の個数: 54

約数和(自身を含む): 38201982

約数和(自身を除く): 17823957

約数列:

[1, 3, 5, 9, 15, 25, 41, 45, 47, 75, 123, 141, 205, 225, 235, 369, 423, 615, 705, 1025, 1175, 1845, 1927, 2115, 2209, 3075, 3525, 5781, 6627, 9225, 9635, 10575, 11045, 17343, 19881, 28905, 33135, 48175, 55225, 86715, 90569, 99405, 144525, 165675, 271707, 433575, 452845, 497025, 815121, 1358535, 2264225, 4075605, 6792675, 20378025]

約数ペア:

[(1, 20378025), (3, 6792675), (5, 4075605), (9, 2264225), (15, 1358535), (25, 815121), (41, 497025), (45, 452845), (47, 433575), (75, 271707), (123, 165675), (141, 144525), (205, 99405), (225, 90569), (235, 86715), (369, 55225), (423, 48175), (615, 33135), (705, 28905), (1025, 19881), (1175, 17343), (1845, 11045), (1927, 10575), (2115, 9635), (2209, 9225), (3075, 6627), (3525, 5781)]