20180781

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{167}}^1\times {\mathrm{463}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 30401280

約数和(自身を除く): 10220499

約数列:

[1, 3, 9, 29, 87, 167, 261, 463, 501, 1389, 1503, 4167, 4843, 13427, 14529, 40281, 43587, 77321, 120843, 231963, 695889, 2242309, 6726927, 20180781]

約数ペア:

[(1, 20180781), (3, 6726927), (9, 2242309), (29, 695889), (87, 231963), (167, 120843), (261, 77321), (463, 43587), (501, 40281), (1389, 14529), (1503, 13427), (4167, 4843)]