1987115

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1609}}^1$

素因数の和:1646

約数の個数: 16

約数和(自身を含む): 2704800

約数和(自身を除く): 717685

約数列:

[1, 5, 13, 19, 65, 95, 247, 1235, 1609, 8045, 20917, 30571, 104585, 152855, 397423, 1987115]

約数ペア:

[(1, 1987115), (5, 397423), (13, 152855), (19, 104585), (65, 30571), (95, 20917), (247, 8045), (1235, 1609)]