81706480

素因数分解:

$2^4\times 5^1\times {\mathrm{1021331}}^1$

素因数の和:1021344

約数の個数: 20

約数和(自身を含む): 189967752

約数和(自身を除く): 108261272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1021331, 2042662, 4085324, 5106655, 8170648, 10213310, 16341296, 20426620, 40853240, 81706480]

約数ペア:

[(1, 81706480), (2, 40853240), (4, 20426620), (5, 16341296), (8, 10213310), (10, 8170648), (16, 5106655), (20, 4085324), (40, 2042662), (80, 1021331)]