21729980

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{23117}}^1$

素因数の和:23173

約数の個数: 24

約数和(自身を含む): 46605888

約数和(自身を除く): 24875908

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 23117, 46234, 92468, 115585, 231170, 462340, 1086499, 2172998, 4345996, 5432495, 10864990, 21729980]

約数ペア:

[(1, 21729980), (2, 10864990), (4, 5432495), (5, 4345996), (10, 2172998), (20, 1086499), (47, 462340), (94, 231170), (188, 115585), (235, 92468), (470, 46234), (940, 23117)]