78920560

素因数分解:

$2^4\times 5^1\times {\mathrm{986507}}^1$

素因数の和:986520

約数の個数: 20

約数和(自身を含む): 183490488

約数和(自身を除く): 104569928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 986507, 1973014, 3946028, 4932535, 7892056, 9865070, 15784112, 19730140, 39460280, 78920560]

約数ペア:

[(1, 78920560), (2, 39460280), (4, 19730140), (5, 15784112), (8, 9865070), (10, 7892056), (16, 4932535), (20, 3946028), (40, 1973014), (80, 986507)]