21058515

素因数分解:

$3^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{401}}^1$

素因数の和:804

約数の個数: 32

約数和(自身を含む): 37627200

約数和(自身を除く): 16568685

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 389, 401, 1167, 1203, 1945, 2005, 3501, 3609, 5835, 6015, 10503, 10827, 17505, 18045, 52515, 54135, 155989, 467967, 779945, 1403901, 2339835, 4211703, 7019505, 21058515]

約数ペア:

[(1, 21058515), (3, 7019505), (5, 4211703), (9, 2339835), (15, 1403901), (27, 779945), (45, 467967), (135, 155989), (389, 54135), (401, 52515), (1167, 18045), (1203, 17505), (1945, 10827), (2005, 10503), (3501, 6015), (3609, 5835)]