21287048

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{181}}^1\times {\mathrm{241}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 40960920

約数和(自身を除く): 19673872

約数列:

[1, 2, 4, 8, 61, 122, 181, 241, 244, 362, 482, 488, 724, 964, 1448, 1928, 11041, 14701, 22082, 29402, 43621, 44164, 58804, 87242, 88328, 117608, 174484, 348968, 2660881, 5321762, 10643524, 21287048]

約数ペア:

[(1, 21287048), (2, 10643524), (4, 5321762), (8, 2660881), (61, 348968), (122, 174484), (181, 117608), (241, 88328), (244, 87242), (362, 58804), (482, 44164), (488, 43621), (724, 29402), (964, 22082), (1448, 14701), (1928, 11041)]