18961880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{281}}^1$

素因数の和:540

約数の個数: 64

約数和(自身を含む): 49135680

約数和(自身を除く): 30173800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 241, 280, 281, 482, 562, 964, 1124, 1205, 1405, 1687, 1928, 1967, 2248, 2410, 2810, 3374, 3934, 4820, 5620, 6748, 7868, 8435, 9640, 9835, 11240, 13496, 15736, 16870, 19670, 33740, 39340, 67480, 67721, 78680, 135442, 270884, 338605, 474047, 541768, 677210, 948094, 1354420, 1896188, 2370235, 2708840, 3792376, 4740470, 9480940, 18961880]

約数ペア:

[(1, 18961880), (2, 9480940), (4, 4740470), (5, 3792376), (7, 2708840), (8, 2370235), (10, 1896188), (14, 1354420), (20, 948094), (28, 677210), (35, 541768), (40, 474047), (56, 338605), (70, 270884), (140, 135442), (241, 78680), (280, 67721), (281, 67480), (482, 39340), (562, 33740), (964, 19670), (1124, 16870), (1205, 15736), (1405, 13496), (1687, 11240), (1928, 9835), (1967, 9640), (2248, 8435), (2410, 7868), (2810, 6748), (3374, 5620), (3934, 4820)]