21521941

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1\times {\mathrm{421}}^1$

素因数の和:604

約数の個数: 16

約数和(自身を含む): 25252480

約数和(自身を除く): 3730539

約数列:

[1, 7, 67, 109, 421, 469, 763, 2947, 7303, 28207, 45889, 51121, 197449, 321223, 3074563, 21521941]

約数ペア:

[(1, 21521941), (7, 3074563), (67, 321223), (109, 197449), (421, 51121), (469, 45889), (763, 28207), (2947, 7303)]