20881212

素因数分解:

$2^2\times 3^1\times {\mathrm{11}}^2\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:299

約数の個数: 72

約数和(自身を含む): 54564048

約数和(自身を除く): 33682836

約数列:

[1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 73, 121, 132, 146, 197, 219, 242, 292, 363, 394, 438, 484, 591, 726, 788, 803, 876, 1182, 1452, 1606, 2167, 2364, 2409, 3212, 4334, 4818, 6501, 8668, 8833, 9636, 13002, 14381, 17666, 23837, 26004, 26499, 28762, 35332, 43143, 47674, 52998, 57524, 71511, 86286, 95348, 105996, 143022, 158191, 172572, 286044, 316382, 474573, 632764, 949146, 1740101, 1898292, 3480202, 5220303, 6960404, 10440606, 20881212]

約数ペア:

[(1, 20881212), (2, 10440606), (3, 6960404), (4, 5220303), (6, 3480202), (11, 1898292), (12, 1740101), (22, 949146), (33, 632764), (44, 474573), (66, 316382), (73, 286044), (121, 172572), (132, 158191), (146, 143022), (197, 105996), (219, 95348), (242, 86286), (292, 71511), (363, 57524), (394, 52998), (438, 47674), (484, 43143), (591, 35332), (726, 28762), (788, 26499), (803, 26004), (876, 23837), (1182, 17666), (1452, 14381), (1606, 13002), (2167, 9636), (2364, 8833), (2409, 8668), (3212, 6501), (4334, 4818)]