81278810

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{198241}}^1$

素因数の和:198289

約数の個数: 16

約数和(自身を含む): 149870952

約数和(自身を除く): 68592142

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 198241, 396482, 991205, 1982410, 8127881, 16255762, 40639405, 81278810]

約数ペア:

[(1, 81278810), (2, 40639405), (5, 16255762), (10, 8127881), (41, 1982410), (82, 991205), (205, 396482), (410, 198241)]