21198939

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{3889}}^1$

素因数の和:3994

約数の個数: 16

約数和(自身を含む): 29875200

約数和(自身を除く): 8676261

約数列:

[1, 3, 23, 69, 79, 237, 1817, 3889, 5451, 11667, 89447, 268341, 307231, 921693, 7066313, 21198939]

約数ペア:

[(1, 21198939), (3, 7066313), (23, 921693), (69, 307231), (79, 268341), (237, 89447), (1817, 11667), (3889, 5451)]