18860245

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1\times {\mathrm{449}}^1$

素因数の和:756

約数の個数: 16

約数和(自身を含む): 23500800

約数和(自身を除く): 4640555

約数列:

[1, 5, 31, 155, 271, 449, 1355, 2245, 8401, 13919, 42005, 69595, 121679, 608395, 3772049, 18860245]

約数ペア:

[(1, 18860245), (5, 3772049), (31, 608395), (155, 121679), (271, 69595), (449, 42005), (1355, 13919), (2245, 8401)]