21136568

素因数分解:

$2^3\times {\mathrm{491}}^1\times {\mathrm{5381}}^1$

素因数の和:5878

約数の個数: 16

約数和(自身を含む): 39719160

約数和(自身を除く): 18582592

約数列:

[1, 2, 4, 8, 491, 982, 1964, 3928, 5381, 10762, 21524, 43048, 2642071, 5284142, 10568284, 21136568]

約数ペア:

[(1, 21136568), (2, 10568284), (4, 5284142), (8, 2642071), (491, 43048), (982, 21524), (1964, 10762), (3928, 5381)]