21493978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{51421}}^1$

素因数の和:51453

約数の個数: 16

約数和(自身を含む): 37023840

約数和(自身を除く): 15529862

約数列:

[1, 2, 11, 19, 22, 38, 209, 418, 51421, 102842, 565631, 976999, 1131262, 1953998, 10746989, 21493978]

約数ペア:

[(1, 21493978), (2, 10746989), (11, 1953998), (19, 1131262), (22, 976999), (38, 565631), (209, 102842), (418, 51421)]