21613340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{263}}^1\times {\mathrm{587}}^1$

素因数の和:866

約数の個数: 48

約数和(自身を含む): 52157952

約数和(自身を除く): 30544612

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 263, 526, 587, 1052, 1174, 1315, 1841, 2348, 2630, 2935, 3682, 4109, 5260, 5870, 7364, 8218, 9205, 11740, 16436, 18410, 20545, 36820, 41090, 82180, 154381, 308762, 617524, 771905, 1080667, 1543810, 2161334, 3087620, 4322668, 5403335, 10806670, 21613340]

約数ペア:

[(1, 21613340), (2, 10806670), (4, 5403335), (5, 4322668), (7, 3087620), (10, 2161334), (14, 1543810), (20, 1080667), (28, 771905), (35, 617524), (70, 308762), (140, 154381), (263, 82180), (526, 41090), (587, 36820), (1052, 20545), (1174, 18410), (1315, 16436), (1841, 11740), (2348, 9205), (2630, 8218), (2935, 7364), (3682, 5870), (4109, 5260)]