31215920

素因数分解:

$2^4\times 5^1\times {\mathrm{390199}}^1$

素因数の和:390212

約数の個数: 20

約数和(自身を含む): 72577200

約数和(自身を除く): 41361280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 390199, 780398, 1560796, 1950995, 3121592, 3901990, 6243184, 7803980, 15607960, 31215920]

約数ペア:

[(1, 31215920), (2, 15607960), (4, 7803980), (5, 6243184), (8, 3901990), (10, 3121592), (16, 1950995), (20, 1560796), (40, 780398), (80, 390199)]