20990345

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{401}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 27569160

約数和(自身を除く): 6578815

約数列:

[1, 5, 19, 29, 95, 145, 361, 401, 551, 1805, 2005, 2755, 7619, 10469, 11629, 38095, 52345, 58145, 144761, 220951, 723805, 1104755, 4198069, 20990345]

約数ペア:

[(1, 20990345), (5, 4198069), (19, 1104755), (29, 723805), (95, 220951), (145, 144761), (361, 58145), (401, 52345), (551, 38095), (1805, 11629), (2005, 10469), (2755, 7619)]