81984920

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{43609}}^1$

素因数の和:43667

約数の個数: 32

約数和(自身を含む): 188395200

約数和(自身を除く): 106410280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 43609, 87218, 174436, 218045, 348872, 436090, 872180, 1744360, 2049623, 4099246, 8198492, 10248115, 16396984, 20496230, 40992460, 81984920]

約数ペア:

[(1, 81984920), (2, 40992460), (4, 20496230), (5, 16396984), (8, 10248115), (10, 8198492), (20, 4099246), (40, 2049623), (47, 1744360), (94, 872180), (188, 436090), (235, 348872), (376, 218045), (470, 174436), (940, 87218), (1880, 43609)]