21878840

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14783}}^1$

素因数の和:14831

約数の個数: 32

約数和(自身を含む): 50561280

約数和(自身を除く): 28682440

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14783, 29566, 59132, 73915, 118264, 147830, 295660, 546971, 591320, 1093942, 2187884, 2734855, 4375768, 5469710, 10939420, 21878840]

約数ペア:

[(1, 21878840), (2, 10939420), (4, 5469710), (5, 4375768), (8, 2734855), (10, 2187884), (20, 1093942), (37, 591320), (40, 546971), (74, 295660), (148, 147830), (185, 118264), (296, 73915), (370, 59132), (740, 29566), (1480, 14783)]