31391120

素因数分解:

$2^4\times 5^1\times {\mathrm{392389}}^1$

素因数の和:392402

約数の個数: 20

約数和(自身を含む): 72984540

約数和(自身を除く): 41593420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 392389, 784778, 1569556, 1961945, 3139112, 3923890, 6278224, 7847780, 15695560, 31391120]

約数ペア:

[(1, 31391120), (2, 15695560), (4, 7847780), (5, 6278224), (8, 3923890), (10, 3139112), (16, 1961945), (20, 1569556), (40, 784778), (80, 392389)]