20647215

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{19949}}^1$

素因数の和:19983

約数の個数: 24

約数和(自身を含む): 37346400

約数和(自身を除く): 16699185

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 19949, 59847, 99745, 179541, 299235, 458827, 897705, 1376481, 2294135, 4129443, 6882405, 20647215]

約数ペア:

[(1, 20647215), (3, 6882405), (5, 4129443), (9, 2294135), (15, 1376481), (23, 897705), (45, 458827), (69, 299235), (115, 179541), (207, 99745), (345, 59847), (1035, 19949)]