21253115

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{17209}}^1$

素因数の和:17246

約数の個数: 16

約数和(自身を含む): 28912800

約数和(自身を除く): 7659685

約数列:

[1, 5, 13, 19, 65, 95, 247, 1235, 17209, 86045, 223717, 326971, 1118585, 1634855, 4250623, 21253115]

約数ペア:

[(1, 21253115), (5, 4250623), (13, 1634855), (19, 1118585), (65, 326971), (95, 223717), (247, 86045), (1235, 17209)]