21168907684

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{278538259}}^1$

素因数の和:278538282

約数の個数: 12

約数和(自身を含む): 38995356400

約数和(自身を除く): 17826448716

約数列:

[1, 2, 4, 19, 38, 76, 278538259, 557076518, 1114153036, 5292226921, 10584453842, 21168907684]

約数ペア:

[(1, 21168907684), (2, 10584453842), (4, 5292226921), (19, 1114153036), (38, 557076518), (76, 278538259)]