21090509

素因数分解:

${\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{487}}^1$

素因数の和:656

約数の個数: 16

約数和(自身を含む): 23986176

約数和(自身を除く): 2895667

約数列:

[1, 11, 31, 127, 341, 487, 1397, 3937, 5357, 15097, 43307, 61849, 166067, 680339, 1917319, 21090509]

約数ペア:

[(1, 21090509), (11, 1917319), (31, 680339), (127, 166067), (341, 61849), (487, 43307), (1397, 15097), (3937, 5357)]