21911215

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{6967}}^1$

素因数の和:7026

約数の個数: 16

約数和(自身を含む): 28596672

約数和(自身を除く): 6685457

約数列:

[1, 5, 17, 37, 85, 185, 629, 3145, 6967, 34835, 118439, 257779, 592195, 1288895, 4382243, 21911215]

約数ペア:

[(1, 21911215), (5, 4382243), (17, 1288895), (37, 592195), (85, 257779), (185, 118439), (629, 34835), (3145, 6967)]