19749205

素因数分解:

$5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{541}}^1$

素因数の和:709

約数の個数: 24

約数和(自身を含む): 27804600

約数和(自身を除く): 8055395

約数列:

[1, 5, 7, 35, 49, 149, 245, 541, 745, 1043, 2705, 3787, 5215, 7301, 18935, 26509, 36505, 80609, 132545, 403045, 564263, 2821315, 3949841, 19749205]

約数ペア:

[(1, 19749205), (5, 3949841), (7, 2821315), (35, 564263), (49, 403045), (149, 132545), (245, 80609), (541, 36505), (745, 26509), (1043, 18935), (2705, 7301), (3787, 5215)]