21506782

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{181}}^1\times {\mathrm{491}}^1$

素因数の和:696

約数の個数: 24

約数和(自身を含む): 35728056

約数和(自身を除く): 14221274

約数列:

[1, 2, 11, 22, 121, 181, 242, 362, 491, 982, 1991, 3982, 5401, 10802, 21901, 43802, 59411, 88871, 118822, 177742, 977581, 1955162, 10753391, 21506782]

約数ペア:

[(1, 21506782), (2, 10753391), (11, 1955162), (22, 977581), (121, 177742), (181, 118822), (242, 88871), (362, 59411), (491, 43802), (982, 21901), (1991, 10802), (3982, 5401)]