21407740

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26107}}^1$

素因数の和:26157

約数の個数: 24

約数和(自身を含む): 46054512

約数和(自身を除く): 24646772

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26107, 52214, 104428, 130535, 261070, 522140, 1070387, 2140774, 4281548, 5351935, 10703870, 21407740]

約数ペア:

[(1, 21407740), (2, 10703870), (4, 5351935), (5, 4281548), (10, 2140774), (20, 1070387), (41, 522140), (82, 261070), (164, 130535), (205, 104428), (410, 52214), (820, 26107)]