21409564

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{491}}^1\times {\mathrm{991}}^1$

素因数の和:1497

約数の個数: 24

約数和(自身を含む): 40997376

約数和(自身を除く): 19587812

約数列:

[1, 2, 4, 11, 22, 44, 491, 982, 991, 1964, 1982, 3964, 5401, 10802, 10901, 21604, 21802, 43604, 486581, 973162, 1946324, 5352391, 10704782, 21409564]

約数ペア:

[(1, 21409564), (2, 10704782), (4, 5352391), (11, 1946324), (22, 973162), (44, 486581), (491, 43604), (982, 21802), (991, 21604), (1964, 10901), (1982, 10802), (3964, 5401)]