19878988

素因数分解:

$2^2\times {\mathrm{59}}^1\times {\mathrm{131}}^1\times {\mathrm{643}}^1$

素因数の和:837

約数の個数: 24

約数和(自身を含む): 35703360

約数和(自身を除く): 15824372

約数列:

[1, 2, 4, 59, 118, 131, 236, 262, 524, 643, 1286, 2572, 7729, 15458, 30916, 37937, 75874, 84233, 151748, 168466, 336932, 4969747, 9939494, 19878988]

約数ペア:

[(1, 19878988), (2, 9939494), (4, 4969747), (59, 336932), (118, 168466), (131, 151748), (236, 84233), (262, 75874), (524, 37937), (643, 30916), (1286, 15458), (2572, 7729)]