21517581

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{2861}}^1$

素因数の和:2996

約数の個数: 16

約数和(自身を含む): 30222720

約数和(自身を除く): 8705139

約数列:

[1, 3, 23, 69, 109, 327, 2507, 2861, 7521, 8583, 65803, 197409, 311849, 935547, 7172527, 21517581]

約数ペア:

[(1, 21517581), (3, 7172527), (23, 935547), (69, 311849), (109, 197409), (327, 65803), (2507, 8583), (2861, 7521)]