21798505

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{317}}^1\times {\mathrm{809}}^1$

素因数の和:1148

約数の個数: 16

約数和(自身を含む): 27818640

約数和(自身を除く): 6020135

約数列:

[1, 5, 17, 85, 317, 809, 1585, 4045, 5389, 13753, 26945, 68765, 256453, 1282265, 4359701, 21798505]

約数ペア:

[(1, 21798505), (5, 4359701), (17, 1282265), (85, 256453), (317, 68765), (809, 26945), (1585, 13753), (4045, 5389)]