391120

素因数分解:

$2^4\times 5^1\times {\mathrm{4889}}^1$

素因数の和:4902

約数の個数: 20

約数和(自身を含む): 909540

約数和(自身を除く): 518420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4889, 9778, 19556, 24445, 39112, 48890, 78224, 97780, 195560, 391120]

約数ペア:

[(1, 391120), (2, 195560), (4, 97780), (5, 78224), (8, 48890), (10, 39112), (16, 24445), (20, 19556), (40, 9778), (80, 4889)]