815915990

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1990039}}^1$

素因数の和:1990087

約数の個数: 16

約数和(自身を含む): 1504470240

約数和(自身を除く): 688554250

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 1990039, 3980078, 9950195, 19900390, 81591599, 163183198, 407957995, 815915990]

約数ペア:

[(1, 815915990), (2, 407957995), (5, 163183198), (10, 81591599), (41, 19900390), (82, 9950195), (205, 3980078), (410, 1990039)]