21000978831

素因数分解:

$3^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{1061}}^1\times {\mathrm{3911}}^1$

素因数の和:5223

約数の個数: 32

約数和(自身を含む): 32172788736

約数和(自身を除く): 11171809905

約数列:

[1, 3, 7, 21, 241, 723, 1061, 1687, 3183, 3911, 5061, 7427, 11733, 22281, 27377, 82131, 255701, 767103, 942551, 1789907, 2827653, 4149571, 5369721, 6597857, 12448713, 19793571, 29046997, 87140991, 1000046611, 3000139833, 7000326277, 21000978831]

約数ペア:

[(1, 21000978831), (3, 7000326277), (7, 3000139833), (21, 1000046611), (241, 87140991), (723, 29046997), (1061, 19793571), (1687, 12448713), (3183, 6597857), (3911, 5369721), (5061, 4149571), (7427, 2827653), (11733, 1789907), (22281, 942551), (27377, 767103), (82131, 255701)]