21376760

素因数分解:

$2^3\times 5^1\times {\mathrm{547}}^1\times {\mathrm{977}}^1$

素因数の和:1535

約数の個数: 32

約数和(自身を含む): 48234960

約数和(自身を除く): 26858200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547, 977, 1094, 1954, 2188, 2735, 3908, 4376, 4885, 5470, 7816, 9770, 10940, 19540, 21880, 39080, 534419, 1068838, 2137676, 2672095, 4275352, 5344190, 10688380, 21376760]

約数ペア:

[(1, 21376760), (2, 10688380), (4, 5344190), (5, 4275352), (8, 2672095), (10, 2137676), (20, 1068838), (40, 534419), (547, 39080), (977, 21880), (1094, 19540), (1954, 10940), (2188, 9770), (2735, 7816), (3908, 5470), (4376, 4885)]