18151991

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{5519}}^1$

素因数の和:5566

約数の個数: 16

約数和(自身を含む): 22256640

約数和(自身を除く): 4104649

約数列:

[1, 11, 13, 23, 143, 253, 299, 3289, 5519, 60709, 71747, 126937, 789217, 1396307, 1650181, 18151991]

約数ペア:

[(1, 18151991), (11, 1650181), (13, 1396307), (23, 789217), (143, 126937), (253, 71747), (299, 60709), (3289, 5519)]