31231280

素因数分解:

$2^4\times 5^1\times {\mathrm{390391}}^1$

素因数の和:390404

約数の個数: 20

約数和(自身を含む): 72612912

約数和(自身を除く): 41381632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 390391, 780782, 1561564, 1951955, 3123128, 3903910, 6246256, 7807820, 15615640, 31231280]

約数ペア:

[(1, 31231280), (2, 15615640), (4, 7807820), (5, 6246256), (8, 3903910), (10, 3123128), (16, 1951955), (20, 1561564), (40, 780782), (80, 390391)]