21990845

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{3527}}^1$

素因数の和:3604

約数の個数: 16

約数和(自身を含む): 27941760

約数和(自身を除く): 5950915

約数列:

[1, 5, 29, 43, 145, 215, 1247, 3527, 6235, 17635, 102283, 151661, 511415, 758305, 4398169, 21990845]

約数ペア:

[(1, 21990845), (5, 4398169), (29, 758305), (43, 511415), (145, 151661), (215, 102283), (1247, 17635), (3527, 6235)]