19899845

素因数分解:

$5^1\times 7^1\times {\mathrm{641}}^1\times {\mathrm{887}}^1$

素因数の和:1540

約数の個数: 16

約数和(自身を含む): 27364608

約数和(自身を除く): 7464763

約数列:

[1, 5, 7, 35, 641, 887, 3205, 4435, 4487, 6209, 22435, 31045, 568567, 2842835, 3979969, 19899845]

約数ペア:

[(1, 19899845), (5, 3979969), (7, 2842835), (35, 568567), (641, 31045), (887, 22435), (3205, 6209), (4435, 4487)]