21105580

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55541}}^1$

素因数の和:55569

約数の個数: 24

約数和(自身を含む): 46655280

約数和(自身を除く): 25549700

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55541, 111082, 222164, 277705, 555410, 1055279, 1110820, 2110558, 4221116, 5276395, 10552790, 21105580]

約数ペア:

[(1, 21105580), (2, 10552790), (4, 5276395), (5, 4221116), (10, 2110558), (19, 1110820), (20, 1055279), (38, 555410), (76, 277705), (95, 222164), (190, 111082), (380, 55541)]