21115947

素因数分解:

$3^1\times {\mathrm{83}}^1\times {\mathrm{137}}^1\times {\mathrm{619}}^1$

素因数の和:842

約数の個数: 16

約数和(自身を含む): 28748160

約数和(自身を除く): 7632213

約数列:

[1, 3, 83, 137, 249, 411, 619, 1857, 11371, 34113, 51377, 84803, 154131, 254409, 7038649, 21115947]

約数ペア:

[(1, 21115947), (3, 7038649), (83, 254409), (137, 154131), (249, 84803), (411, 51377), (619, 34113), (1857, 11371)]