31231120

素因数分解:

$2^4\times 5^1\times {\mathrm{390389}}^1$

素因数の和:390402

約数の個数: 20

約数和(自身を含む): 72612540

約数和(自身を除く): 41381420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 390389, 780778, 1561556, 1951945, 3123112, 3903890, 6246224, 7807780, 15615560, 31231120]

約数ペア:

[(1, 31231120), (2, 15615560), (4, 7807780), (5, 6246224), (8, 3903890), (10, 3123112), (16, 1951945), (20, 1561556), (40, 780778), (80, 390389)]