21158275

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{1187}}^1$

素因数の和:1251

約数の個数: 24

約数和(自身を含む): 28283904

約数和(自身を除く): 7125629

約数列:

[1, 5, 23, 25, 31, 115, 155, 575, 713, 775, 1187, 3565, 5935, 17825, 27301, 29675, 36797, 136505, 183985, 682525, 846331, 919925, 4231655, 21158275]

約数ペア:

[(1, 21158275), (5, 4231655), (23, 919925), (25, 846331), (31, 682525), (115, 183985), (155, 136505), (575, 36797), (713, 29675), (775, 27301), (1187, 17825), (3565, 5935)]