21697155

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11213}}^1$

素因数の和:11267

約数の個数: 24

約数和(自身を含む): 38486448

約数和(自身を除く): 16789293

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 11213, 33639, 56065, 100917, 168195, 482159, 504585, 1446477, 2410795, 4339431, 7232385, 21697155]

約数ペア:

[(1, 21697155), (3, 7232385), (5, 4339431), (9, 2410795), (15, 1446477), (43, 504585), (45, 482159), (129, 168195), (215, 100917), (387, 56065), (645, 33639), (1935, 11213)]