21061918

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{4231}}^1$

素因数の和:4383

約数の個数: 16

約数和(自身を含む): 33517440

約数和(自身を除く): 12455522

約数列:

[1, 2, 19, 38, 131, 262, 2489, 4231, 4978, 8462, 80389, 160778, 554261, 1108522, 10530959, 21061918]

約数ペア:

[(1, 21061918), (2, 10530959), (19, 1108522), (38, 554261), (131, 160778), (262, 80389), (2489, 8462), (4231, 4978)]