81342770

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{198397}}^1$

素因数の和:198445

約数の個数: 16

約数和(自身を含む): 149988888

約数和(自身を除く): 68646118

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 198397, 396794, 991985, 1983970, 8134277, 16268554, 40671385, 81342770]

約数ペア:

[(1, 81342770), (2, 40671385), (5, 16268554), (10, 8134277), (41, 1983970), (82, 991985), (205, 396794), (410, 198397)]