21564080

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2617}}^1$

素因数の和:2733

約数の個数: 40

約数和(自身を含む): 50642592

約数和(自身を除く): 29078512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 2617, 4120, 5234, 8240, 10468, 13085, 20936, 26170, 41872, 52340, 104680, 209360, 269551, 539102, 1078204, 1347755, 2156408, 2695510, 4312816, 5391020, 10782040, 21564080]

約数ペア:

[(1, 21564080), (2, 10782040), (4, 5391020), (5, 4312816), (8, 2695510), (10, 2156408), (16, 1347755), (20, 1078204), (40, 539102), (80, 269551), (103, 209360), (206, 104680), (412, 52340), (515, 41872), (824, 26170), (1030, 20936), (1648, 13085), (2060, 10468), (2617, 8240), (4120, 5234)]