1640863760

素因数分解:

$2^4\times 5^1\times {\mathrm{20510797}}^1$

素因数の和:20510810

約数の個数: 20

約数和(自身を含む): 3815008428

約数和(自身を除く): 2174144668

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 20510797, 41021594, 82043188, 102553985, 164086376, 205107970, 328172752, 410215940, 820431880, 1640863760]

約数ペア:

[(1, 1640863760), (2, 820431880), (4, 410215940), (5, 328172752), (8, 205107970), (10, 164086376), (16, 102553985), (20, 82043188), (40, 41021594), (80, 20510797)]