19881385

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{4423}}^1$

素因数の和:4488

約数の個数: 16

約数和(自身を含む): 25482240

約数和(自身を除く): 5600855

約数列:

[1, 5, 29, 31, 145, 155, 899, 4423, 4495, 22115, 128267, 137113, 641335, 685565, 3976277, 19881385]

約数ペア:

[(1, 19881385), (5, 3976277), (29, 685565), (31, 641335), (145, 137113), (155, 128267), (899, 22115), (4423, 4495)]