21557320

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{3617}}^1$

素因数の和:3777

約数の個数: 32

約数和(自身を含む): 48843000

約数和(自身を除く): 27285680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 596, 745, 1192, 1490, 2980, 3617, 5960, 7234, 14468, 18085, 28936, 36170, 72340, 144680, 538933, 1077866, 2155732, 2694665, 4311464, 5389330, 10778660, 21557320]

約数ペア:

[(1, 21557320), (2, 10778660), (4, 5389330), (5, 4311464), (8, 2694665), (10, 2155732), (20, 1077866), (40, 538933), (149, 144680), (298, 72340), (596, 36170), (745, 28936), (1192, 18085), (1490, 14468), (2980, 7234), (3617, 5960)]