20890545

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{719}}^1$

素因数の和:889

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 15397455

約数列:

[1, 3, 5, 13, 15, 39, 65, 149, 195, 447, 719, 745, 1937, 2157, 2235, 3595, 5811, 9347, 9685, 10785, 28041, 29055, 46735, 107131, 140205, 321393, 535655, 1392703, 1606965, 4178109, 6963515, 20890545]

約数ペア:

[(1, 20890545), (3, 6963515), (5, 4178109), (13, 1606965), (15, 1392703), (39, 535655), (65, 321393), (149, 140205), (195, 107131), (447, 46735), (719, 29055), (745, 28041), (1937, 10785), (2157, 9685), (2235, 9347), (3595, 5811)]