20921615

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1009}}^1$

素因数の和:1067

約数の個数: 32

約数和(自身を含む): 30542400

約数和(自身を除く): 9620785

約数列:

[1, 5, 11, 13, 29, 55, 65, 143, 145, 319, 377, 715, 1009, 1595, 1885, 4147, 5045, 11099, 13117, 20735, 29261, 55495, 65585, 144287, 146305, 321871, 380393, 721435, 1609355, 1901965, 4184323, 20921615]

約数ペア:

[(1, 20921615), (5, 4184323), (11, 1901965), (13, 1609355), (29, 721435), (55, 380393), (65, 321871), (143, 146305), (145, 144287), (319, 65585), (377, 55495), (715, 29261), (1009, 20735), (1595, 13117), (1885, 11099), (4147, 5045)]