21820545

素因数分解:

$3^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4801}}^1$

素因数の和:4913

約数の個数: 24

約数和(自身を含む): 38204712

約数和(自身を除く): 16384167

約数列:

[1, 3, 5, 9, 15, 45, 101, 303, 505, 909, 1515, 4545, 4801, 14403, 24005, 43209, 72015, 216045, 484901, 1454703, 2424505, 4364109, 7273515, 21820545]

約数ペア:

[(1, 21820545), (3, 7273515), (5, 4364109), (9, 2424505), (15, 1454703), (45, 484901), (101, 216045), (303, 72015), (505, 43209), (909, 24005), (1515, 14403), (4545, 4801)]