20156701971

素因数分解:

$3^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{6441899}}^1$

素因数の和:6442058

約数の個数: 16

約数和(自身を含む): 30921120000

約数和(自身を除く): 10764418029

約数列:

[1, 3, 7, 21, 149, 447, 1043, 3129, 6441899, 19325697, 45093293, 135279879, 959842951, 2879528853, 6718900657, 20156701971]

約数ペア:

[(1, 20156701971), (3, 6718900657), (7, 2879528853), (21, 959842951), (149, 135279879), (447, 45093293), (1043, 19325697), (3129, 6441899)]