21821956

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{1699}}^1$

素因数の和:1748

約数の個数: 36

約数和(自身を含む): 43554000

約数和(自身を除く): 21732044

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 169, 247, 338, 494, 676, 988, 1699, 3211, 3398, 6422, 6796, 12844, 22087, 32281, 44174, 64562, 88348, 129124, 287131, 419653, 574262, 839306, 1148524, 1678612, 5455489, 10910978, 21821956]

約数ペア:

[(1, 21821956), (2, 10910978), (4, 5455489), (13, 1678612), (19, 1148524), (26, 839306), (38, 574262), (52, 419653), (76, 287131), (169, 129124), (247, 88348), (338, 64562), (494, 44174), (676, 32281), (988, 22087), (1699, 12844), (3211, 6796), (3398, 6422)]