20399355

素因数分解:

$3^2\times 5^1\times {\mathrm{227}}^1\times {\mathrm{1997}}^1$

素因数の和:2235

約数の個数: 24

約数和(自身を含む): 35532432

約数和(自身を除く): 15133077

約数列:

[1, 3, 5, 9, 15, 45, 227, 681, 1135, 1997, 2043, 3405, 5991, 9985, 10215, 17973, 29955, 89865, 453319, 1359957, 2266595, 4079871, 6799785, 20399355]

約数ペア:

[(1, 20399355), (3, 6799785), (5, 4079871), (9, 2266595), (15, 1359957), (45, 453319), (227, 89865), (681, 29955), (1135, 17973), (1997, 10215), (2043, 9985), (3405, 5991)]