81656421

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{2341}}^1$

素因数の和:2513

約数の個数: 32

約数和(自身を含む): 136697856

約数和(自身を除く): 55041435

約数列:

[1, 3, 7, 11, 21, 33, 77, 151, 231, 453, 1057, 1661, 2341, 3171, 4983, 7023, 11627, 16387, 25751, 34881, 49161, 77253, 180257, 353491, 540771, 1060473, 2474437, 3888401, 7423311, 11665203, 27218807, 81656421]

約数ペア:

[(1, 81656421), (3, 27218807), (7, 11665203), (11, 7423311), (21, 3888401), (33, 2474437), (77, 1060473), (151, 540771), (231, 353491), (453, 180257), (1057, 77253), (1661, 49161), (2341, 34881), (3171, 25751), (4983, 16387), (7023, 11627)]