18961515

素因数分解:

$3^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1997}}^1$

素因数の和:2219

約数の個数: 24

約数和(自身を含む): 33038928

約数和(自身を除く): 14077413

約数列:

[1, 3, 5, 9, 15, 45, 211, 633, 1055, 1899, 1997, 3165, 5991, 9495, 9985, 17973, 29955, 89865, 421367, 1264101, 2106835, 3792303, 6320505, 18961515]

約数ペア:

[(1, 18961515), (3, 6320505), (5, 3792303), (9, 2106835), (15, 1264101), (45, 421367), (211, 89865), (633, 29955), (1055, 17973), (1899, 9985), (1997, 9495), (3165, 5991)]