21219716

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 44029440

約数和(自身を除く): 22809724

約数列:

[1, 2, 4, 7, 14, 28, 53, 79, 106, 158, 181, 212, 316, 362, 371, 553, 724, 742, 1106, 1267, 1484, 2212, 2534, 4187, 5068, 8374, 9593, 14299, 16748, 19186, 28598, 29309, 38372, 57196, 58618, 67151, 100093, 117236, 134302, 200186, 268604, 400372, 757847, 1515694, 3031388, 5304929, 10609858, 21219716]

約数ペア:

[(1, 21219716), (2, 10609858), (4, 5304929), (7, 3031388), (14, 1515694), (28, 757847), (53, 400372), (79, 268604), (106, 200186), (158, 134302), (181, 117236), (212, 100093), (316, 67151), (362, 58618), (371, 57196), (553, 38372), (724, 29309), (742, 28598), (1106, 19186), (1267, 16748), (1484, 14299), (2212, 9593), (2534, 8374), (4187, 5068)]