78257420

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{90997}}^1$

素因数の和:91049

約数の個数: 24

約数和(自身を含む): 168164304

約数和(自身を除く): 89906884

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 90997, 181994, 363988, 454985, 909970, 1819940, 3912871, 7825742, 15651484, 19564355, 39128710, 78257420]

約数ペア:

[(1, 78257420), (2, 39128710), (4, 19564355), (5, 15651484), (10, 7825742), (20, 3912871), (43, 1819940), (86, 909970), (172, 454985), (215, 363988), (430, 181994), (860, 90997)]