21518217

素因数分解:

$3^4\times 7^1\times {\mathrm{37951}}^1$

素因数の和:37970

約数の個数: 20

約数和(自身を含む): 36737536

約数和(自身を除く): 15219319

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37951, 113853, 265657, 341559, 796971, 1024677, 2390913, 3074031, 7172739, 21518217]

約数ペア:

[(1, 21518217), (3, 7172739), (7, 3074031), (9, 2390913), (21, 1024677), (27, 796971), (63, 341559), (81, 265657), (189, 113853), (567, 37951)]