128840405

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{419}}^1\times {\mathrm{691}}^1$

素因数の和:1204

約数の個数: 16

約数和(自身を含む): 156945600

約数和(自身を除く): 28105195

約数列:

[1, 5, 89, 419, 445, 691, 2095, 3455, 37291, 61499, 186455, 289529, 307495, 1447645, 25768081, 128840405]

約数ペア:

[(1, 128840405), (5, 25768081), (89, 1447645), (419, 307495), (445, 289529), (691, 186455), (2095, 61499), (3455, 37291)]