811960280

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{51131}}^1$

素因数の和:51539

約数の個数: 32

約数和(自身を含む): 1831548240

約数和(自身を除く): 1019587960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 15880, 51131, 102262, 204524, 255655, 409048, 511310, 1022620, 2045240, 20299007, 40598014, 81196028, 101495035, 162392056, 202990070, 405980140, 811960280]

約数ペア:

[(1, 811960280), (2, 405980140), (4, 202990070), (5, 162392056), (8, 101495035), (10, 81196028), (20, 40598014), (40, 20299007), (397, 2045240), (794, 1022620), (1588, 511310), (1985, 409048), (3176, 255655), (3970, 204524), (7940, 102262), (15880, 51131)]