20521780

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5669}}^1$

素因数の和:5859

約数の個数: 24

約数和(自身を含む): 43341480

約数和(自身を除く): 22819700

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5669, 11338, 22676, 28345, 56690, 113380, 1026089, 2052178, 4104356, 5130445, 10260890, 20521780]

約数ペア:

[(1, 20521780), (2, 10260890), (4, 5130445), (5, 4104356), (10, 2052178), (20, 1026089), (181, 113380), (362, 56690), (724, 28345), (905, 22676), (1810, 11338), (3620, 5669)]