81051640

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{7211}}^1$

素因数の和:7503

約数の個数: 32

約数和(自身を含む): 183040560

約数和(自身を除く): 101988920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 2248, 2810, 5620, 7211, 11240, 14422, 28844, 36055, 57688, 72110, 144220, 288440, 2026291, 4052582, 8105164, 10131455, 16210328, 20262910, 40525820, 81051640]

約数ペア:

[(1, 81051640), (2, 40525820), (4, 20262910), (5, 16210328), (8, 10131455), (10, 8105164), (20, 4052582), (40, 2026291), (281, 288440), (562, 144220), (1124, 72110), (1405, 57688), (2248, 36055), (2810, 28844), (5620, 14422), (7211, 11240)]