19255720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{409}}^1$

素因数の和:538

約数の個数: 64

約数和(自身を含む): 47822400

約数和(自身を除く): 28566680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 107, 110, 214, 220, 409, 428, 440, 535, 818, 856, 1070, 1177, 1636, 2045, 2140, 2354, 3272, 4090, 4280, 4499, 4708, 5885, 8180, 8998, 9416, 11770, 16360, 17996, 22495, 23540, 35992, 43763, 44990, 47080, 87526, 89980, 175052, 179960, 218815, 350104, 437630, 481393, 875260, 962786, 1750520, 1925572, 2406965, 3851144, 4813930, 9627860, 19255720]

約数ペア:

[(1, 19255720), (2, 9627860), (4, 4813930), (5, 3851144), (8, 2406965), (10, 1925572), (11, 1750520), (20, 962786), (22, 875260), (40, 481393), (44, 437630), (55, 350104), (88, 218815), (107, 179960), (110, 175052), (214, 89980), (220, 87526), (409, 47080), (428, 44990), (440, 43763), (535, 35992), (818, 23540), (856, 22495), (1070, 17996), (1177, 16360), (1636, 11770), (2045, 9416), (2140, 8998), (2354, 8180), (3272, 5885), (4090, 4708), (4280, 4499)]