21273260

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25943}}^1$

素因数の和:25993

約数の個数: 24

約数和(自身を含む): 45765216

約数和(自身を除く): 24491956

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25943, 51886, 103772, 129715, 259430, 518860, 1063663, 2127326, 4254652, 5318315, 10636630, 21273260]

約数ペア:

[(1, 21273260), (2, 10636630), (4, 5318315), (5, 4254652), (10, 2127326), (20, 1063663), (41, 518860), (82, 259430), (164, 129715), (205, 103772), (410, 51886), (820, 25943)]