19982745

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{449}}^1$

素因数の和:526

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 17082855

約数列:

[1, 3, 5, 9, 15, 23, 43, 45, 69, 115, 129, 207, 215, 345, 387, 449, 645, 989, 1035, 1347, 1935, 2245, 2967, 4041, 4945, 6735, 8901, 10327, 14835, 19307, 20205, 30981, 44505, 51635, 57921, 92943, 96535, 154905, 173763, 289605, 444061, 464715, 868815, 1332183, 2220305, 3996549, 6660915, 19982745]

約数ペア:

[(1, 19982745), (3, 6660915), (5, 3996549), (9, 2220305), (15, 1332183), (23, 868815), (43, 464715), (45, 444061), (69, 289605), (115, 173763), (129, 154905), (207, 96535), (215, 92943), (345, 57921), (387, 51635), (449, 44505), (645, 30981), (989, 20205), (1035, 19307), (1347, 14835), (1935, 10327), (2245, 8901), (2967, 6735), (4041, 4945)]