20211920

素因数分解:

$2^4\times 5^1\times {\mathrm{317}}^1\times {\mathrm{797}}^1$

素因数の和:1127

約数の個数: 40

約数和(自身を含む): 47200104

約数和(自身を除く): 26988184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 317, 634, 797, 1268, 1585, 1594, 2536, 3170, 3188, 3985, 5072, 6340, 6376, 7970, 12680, 12752, 15940, 25360, 31880, 63760, 252649, 505298, 1010596, 1263245, 2021192, 2526490, 4042384, 5052980, 10105960, 20211920]

約数ペア:

[(1, 20211920), (2, 10105960), (4, 5052980), (5, 4042384), (8, 2526490), (10, 2021192), (16, 1263245), (20, 1010596), (40, 505298), (80, 252649), (317, 63760), (634, 31880), (797, 25360), (1268, 15940), (1585, 12752), (1594, 12680), (2536, 7970), (3170, 6376), (3188, 6340), (3985, 5072)]