21990346

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{2203}}^1$

素因数の和:2266

約数の個数: 32

約数和(自身を含む): 40624128

約数和(自身を除く): 18633782

約数列:

[1, 2, 7, 14, 23, 31, 46, 62, 161, 217, 322, 434, 713, 1426, 2203, 4406, 4991, 9982, 15421, 30842, 50669, 68293, 101338, 136586, 354683, 478051, 709366, 956102, 1570739, 3141478, 10995173, 21990346]

約数ペア:

[(1, 21990346), (2, 10995173), (7, 3141478), (14, 1570739), (23, 956102), (31, 709366), (46, 478051), (62, 354683), (161, 136586), (217, 101338), (322, 68293), (434, 50669), (713, 30842), (1426, 15421), (2203, 9982), (4406, 4991)]