21991428

素因数分解:

$2^2\times 3^2\times {\mathrm{641}}^1\times {\mathrm{953}}^1$

素因数の和:1604

約数の個数: 36

約数和(自身を含む): 55734588

約数和(自身を除く): 33743160

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 641, 953, 1282, 1906, 1923, 2564, 2859, 3812, 3846, 5718, 5769, 7692, 8577, 11436, 11538, 17154, 23076, 34308, 610873, 1221746, 1832619, 2443492, 3665238, 5497857, 7330476, 10995714, 21991428]

約数ペア:

[(1, 21991428), (2, 10995714), (3, 7330476), (4, 5497857), (6, 3665238), (9, 2443492), (12, 1832619), (18, 1221746), (36, 610873), (641, 34308), (953, 23076), (1282, 17154), (1906, 11538), (1923, 11436), (2564, 8577), (2859, 7692), (3812, 5769), (3846, 5718)]