21878240

素因数分解:

$2^5\times 5^1\times {\mathrm{136739}}^1$

素因数の和:136754

約数の個数: 24

約数和(自身を含む): 51687720

約数和(自身を除く): 29809480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 136739, 273478, 546956, 683695, 1093912, 1367390, 2187824, 2734780, 4375648, 5469560, 10939120, 21878240]

約数ペア:

[(1, 21878240), (2, 10939120), (4, 5469560), (5, 4375648), (8, 2734780), (10, 2187824), (16, 1367390), (20, 1093912), (32, 683695), (40, 546956), (80, 273478), (160, 136739)]