18865880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{809}}^1$

素因数の和:884

約数の個数: 64

約数和(自身を含む): 47239200

約数和(自身を除く): 28373320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 53, 55, 88, 106, 110, 212, 220, 265, 424, 440, 530, 583, 809, 1060, 1166, 1618, 2120, 2332, 2915, 3236, 4045, 4664, 5830, 6472, 8090, 8899, 11660, 16180, 17798, 23320, 32360, 35596, 42877, 44495, 71192, 85754, 88990, 171508, 177980, 214385, 343016, 355960, 428770, 471647, 857540, 943294, 1715080, 1886588, 2358235, 3773176, 4716470, 9432940, 18865880]

約数ペア:

[(1, 18865880), (2, 9432940), (4, 4716470), (5, 3773176), (8, 2358235), (10, 1886588), (11, 1715080), (20, 943294), (22, 857540), (40, 471647), (44, 428770), (53, 355960), (55, 343016), (88, 214385), (106, 177980), (110, 171508), (212, 88990), (220, 85754), (265, 71192), (424, 44495), (440, 42877), (530, 35596), (583, 32360), (809, 23320), (1060, 17798), (1166, 16180), (1618, 11660), (2120, 8899), (2332, 8090), (2915, 6472), (3236, 5830), (4045, 4664)]