21031792

素因数分解:

$2^4\times {\mathrm{251}}^1\times {\mathrm{5237}}^1$

素因数の和:5496

約数の個数: 20

約数和(自身を含む): 40919256

約数和(自身を除く): 19887464

約数列:

[1, 2, 4, 8, 16, 251, 502, 1004, 2008, 4016, 5237, 10474, 20948, 41896, 83792, 1314487, 2628974, 5257948, 10515896, 21031792]

約数ペア:

[(1, 21031792), (2, 10515896), (4, 5257948), (8, 2628974), (16, 1314487), (251, 83792), (502, 41896), (1004, 20948), (2008, 10474), (4016, 5237)]