21618508

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{43}}^2\times {\mathrm{79}}^1$

素因数の和:206

約数の個数: 36

約数和(自身を含む): 40283040

約数和(自身を除く): 18664532

約数列:

[1, 2, 4, 37, 43, 74, 79, 86, 148, 158, 172, 316, 1591, 1849, 2923, 3182, 3397, 3698, 5846, 6364, 6794, 7396, 11692, 13588, 68413, 125689, 136826, 146071, 251378, 273652, 292142, 502756, 584284, 5404627, 10809254, 21618508]

約数ペア:

[(1, 21618508), (2, 10809254), (4, 5404627), (37, 584284), (43, 502756), (74, 292142), (79, 273652), (86, 251378), (148, 146071), (158, 136826), (172, 125689), (316, 68413), (1591, 13588), (1849, 11692), (2923, 7396), (3182, 6794), (3397, 6364), (3698, 5846)]