21055620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{3943}}^1$

素因数の和:4044

約数の個数: 48

約数和(自身を含む): 59633280

約数和(自身を除く): 38577660

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, 3943, 5340, 7886, 11829, 15772, 19715, 23658, 39430, 47316, 59145, 78860, 118290, 236580, 350927, 701854, 1052781, 1403708, 1754635, 2105562, 3509270, 4211124, 5263905, 7018540, 10527810, 21055620]

約数ペア:

[(1, 21055620), (2, 10527810), (3, 7018540), (4, 5263905), (5, 4211124), (6, 3509270), (10, 2105562), (12, 1754635), (15, 1403708), (20, 1052781), (30, 701854), (60, 350927), (89, 236580), (178, 118290), (267, 78860), (356, 59145), (445, 47316), (534, 39430), (890, 23658), (1068, 19715), (1335, 15772), (1780, 11829), (2670, 7886), (3943, 5340)]