21076980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{3947}}^1$

素因数の和:4048

約数の個数: 48

約数和(自身を含む): 59693760

約数和(自身を除く): 38616780

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 89, 178, 267, 356, 445, 534, 890, 1068, 1335, 1780, 2670, 3947, 5340, 7894, 11841, 15788, 19735, 23682, 39470, 47364, 59205, 78940, 118410, 236820, 351283, 702566, 1053849, 1405132, 1756415, 2107698, 3512830, 4215396, 5269245, 7025660, 10538490, 21076980]

約数ペア:

[(1, 21076980), (2, 10538490), (3, 7025660), (4, 5269245), (5, 4215396), (6, 3512830), (10, 2107698), (12, 1756415), (15, 1405132), (20, 1053849), (30, 702566), (60, 351283), (89, 236820), (178, 118410), (267, 78940), (356, 59205), (445, 47364), (534, 39470), (890, 23682), (1068, 19735), (1335, 15788), (1780, 11841), (2670, 7894), (3947, 5340)]