21209816

素因数分解:

$2^3\times {\mathrm{239}}^1\times {\mathrm{11093}}^1$

素因数の和:11338

約数の個数: 16

約数和(自身を含む): 39938400

約数和(自身を除く): 18728584

約数列:

[1, 2, 4, 8, 239, 478, 956, 1912, 11093, 22186, 44372, 88744, 2651227, 5302454, 10604908, 21209816]

約数ペア:

[(1, 21209816), (2, 10604908), (4, 5302454), (8, 2651227), (239, 88744), (478, 44372), (956, 22186), (1912, 11093)]