19877300

素因数分解:

$2^2\times 5^2\times {\mathrm{197}}^1\times {\mathrm{1009}}^1$

素因数の和:1220

約数の個数: 36

約数和(自身を含む): 43395660

約数和(自身を除く): 23518360

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 197, 394, 788, 985, 1009, 1970, 2018, 3940, 4036, 4925, 5045, 9850, 10090, 19700, 20180, 25225, 50450, 100900, 198773, 397546, 795092, 993865, 1987730, 3975460, 4969325, 9938650, 19877300]

約数ペア:

[(1, 19877300), (2, 9938650), (4, 4969325), (5, 3975460), (10, 1987730), (20, 993865), (25, 795092), (50, 397546), (100, 198773), (197, 100900), (394, 50450), (788, 25225), (985, 20180), (1009, 19700), (1970, 10090), (2018, 9850), (3940, 5045), (4036, 4925)]