21683431

素因数分解:

$7^4\times {\mathrm{11}}^1\times {\mathrm{821}}^1$

素因数の和:860

約数の個数: 20

約数和(自身を含む): 27629064

約数和(自身を除く): 5945633

約数列:

[1, 7, 11, 49, 77, 343, 539, 821, 2401, 3773, 5747, 9031, 26411, 40229, 63217, 281603, 442519, 1971221, 3097633, 21683431]

約数ペア:

[(1, 21683431), (7, 3097633), (11, 1971221), (49, 442519), (77, 281603), (343, 63217), (539, 40229), (821, 26411), (2401, 9031), (3773, 5747)]