64811980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79039}}^1$

素因数の和:79089

約数の個数: 24

約数和(自身を含む): 139426560

約数和(自身を除く): 74614580

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 79039, 158078, 316156, 395195, 790390, 1580780, 3240599, 6481198, 12962396, 16202995, 32405990, 64811980]

約数ペア:

[(1, 64811980), (2, 32405990), (4, 16202995), (5, 12962396), (10, 6481198), (20, 3240599), (41, 1580780), (82, 790390), (164, 395195), (205, 316156), (410, 158078), (820, 79039)]