21724131

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{641}}^1$

素因数の和:747

約数の個数: 32

約数和(自身を含む): 34513920

約数和(自身を除く): 12789789

約数列:

[1, 3, 11, 13, 33, 39, 79, 143, 237, 429, 641, 869, 1027, 1923, 2607, 3081, 7051, 8333, 11297, 21153, 24999, 33891, 50639, 91663, 151917, 274989, 557029, 658307, 1671087, 1974921, 7241377, 21724131]

約数ペア:

[(1, 21724131), (3, 7241377), (11, 1974921), (13, 1671087), (33, 658307), (39, 557029), (79, 274989), (143, 151917), (237, 91663), (429, 50639), (641, 33891), (869, 24999), (1027, 21153), (1923, 11297), (2607, 8333), (3081, 7051)]