19939400

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7669}}^1$

素因数の和:7698

約数の個数: 48

約数和(自身を含む): 49931700

約数和(自身を除く): 29992300

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 7669, 15338, 30676, 38345, 61352, 76690, 99697, 153380, 191725, 199394, 306760, 383450, 398788, 498485, 766900, 797576, 996970, 1533800, 1993940, 2492425, 3987880, 4984850, 9969700, 19939400]

約数ペア:

[(1, 19939400), (2, 9969700), (4, 4984850), (5, 3987880), (8, 2492425), (10, 1993940), (13, 1533800), (20, 996970), (25, 797576), (26, 766900), (40, 498485), (50, 398788), (52, 383450), (65, 306760), (100, 199394), (104, 191725), (130, 153380), (200, 99697), (260, 76690), (325, 61352), (520, 38345), (650, 30676), (1300, 15338), (2600, 7669)]