21478635

素因数分解:

$3^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{409}}^1$

素因数の和:812

約数の個数: 32

約数和(自身を含む): 38376000

約数和(自身を除く): 16897365

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 389, 409, 1167, 1227, 1945, 2045, 3501, 3681, 5835, 6135, 10503, 11043, 17505, 18405, 52515, 55215, 159101, 477303, 795505, 1431909, 2386515, 4295727, 7159545, 21478635]

約数ペア:

[(1, 21478635), (3, 7159545), (5, 4295727), (9, 2386515), (15, 1431909), (27, 795505), (45, 477303), (135, 159101), (389, 55215), (409, 52515), (1167, 18405), (1227, 17505), (1945, 11043), (2045, 10503), (3501, 6135), (3681, 5835)]