21000791

素因数分解:

$7^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:458

約数の個数: 16

約数和(自身を含む): 24526656

約数和(自身を除く): 3525865

約数列:

[1, 7, 97, 157, 197, 679, 1099, 1379, 15229, 19109, 30929, 106603, 133763, 216503, 3000113, 21000791]

約数ペア:

[(1, 21000791), (7, 3000113), (97, 216503), (157, 133763), (197, 106603), (679, 30929), (1099, 19109), (1379, 15229)]