21109840

素因数分解:

$2^4\times 5^1\times {\mathrm{367}}^1\times {\mathrm{719}}^1$

素因数の和:1099

約数の個数: 40

約数和(自身を含む): 49282560

約数和(自身を除く): 28172720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 367, 719, 734, 1438, 1468, 1835, 2876, 2936, 3595, 3670, 5752, 5872, 7190, 7340, 11504, 14380, 14680, 28760, 29360, 57520, 263873, 527746, 1055492, 1319365, 2110984, 2638730, 4221968, 5277460, 10554920, 21109840]

約数ペア:

[(1, 21109840), (2, 10554920), (4, 5277460), (5, 4221968), (8, 2638730), (10, 2110984), (16, 1319365), (20, 1055492), (40, 527746), (80, 263873), (367, 57520), (719, 29360), (734, 28760), (1438, 14680), (1468, 14380), (1835, 11504), (2876, 7340), (2936, 7190), (3595, 5872), (3670, 5752)]