21169360

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3727}}^1$

素因数の和:3811

約数の個数: 40

約数和(自身を含む): 49925376

約数和(自身を除く): 28756016

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3727, 5680, 7454, 14908, 18635, 29816, 37270, 59632, 74540, 149080, 264617, 298160, 529234, 1058468, 1323085, 2116936, 2646170, 4233872, 5292340, 10584680, 21169360]

約数ペア:

[(1, 21169360), (2, 10584680), (4, 5292340), (5, 4233872), (8, 2646170), (10, 2116936), (16, 1323085), (20, 1058468), (40, 529234), (71, 298160), (80, 264617), (142, 149080), (284, 74540), (355, 59632), (568, 37270), (710, 29816), (1136, 18635), (1420, 14908), (2840, 7454), (3727, 5680)]