21671853

素因数分解:

$3^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{2957}}^1$

素因数の和:3316

約数の個数: 16

約数和(自身を含む): 33129600

約数和(自身を除く): 11457747

約数列:

[1, 3, 7, 21, 349, 1047, 2443, 2957, 7329, 8871, 20699, 62097, 1031993, 3095979, 7223951, 21671853]

約数ペア:

[(1, 21671853), (3, 7223951), (7, 3095979), (21, 1031993), (349, 62097), (1047, 20699), (2443, 8871), (2957, 7329)]