20931573

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{241}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 32199552

約数和(自身を除く): 11267979

約数列:

[1, 3, 13, 17, 39, 51, 131, 221, 241, 393, 663, 723, 1703, 2227, 3133, 4097, 5109, 6681, 9399, 12291, 28951, 31571, 53261, 86853, 94713, 159783, 410423, 536707, 1231269, 1610121, 6977191, 20931573]

約数ペア:

[(1, 20931573), (3, 6977191), (13, 1610121), (17, 1231269), (39, 536707), (51, 410423), (131, 159783), (221, 94713), (241, 86853), (393, 53261), (663, 31571), (723, 28951), (1703, 12291), (2227, 9399), (3133, 6681), (4097, 5109)]