18740815

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{307}}^1\times {\mathrm{421}}^1$

素因数の和:762

約数の個数: 16

約数和(自身を含む): 23395680

約数和(自身を除く): 4654865

約数列:

[1, 5, 29, 145, 307, 421, 1535, 2105, 8903, 12209, 44515, 61045, 129247, 646235, 3748163, 18740815]

約数ペア:

[(1, 18740815), (5, 3748163), (29, 646235), (145, 129247), (307, 61045), (421, 44515), (1535, 12209), (2105, 8903)]