81186520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1\times {\mathrm{281}}^1$

素因数の和:556

約数の個数: 64

約数和(自身を含む): 190045440

約数和(自身を除く): 108858920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 233, 248, 281, 310, 466, 562, 620, 932, 1124, 1165, 1240, 1405, 1864, 2248, 2330, 2810, 4660, 5620, 7223, 8711, 9320, 11240, 14446, 17422, 28892, 34844, 36115, 43555, 57784, 65473, 69688, 72230, 87110, 130946, 144460, 174220, 261892, 288920, 327365, 348440, 523784, 654730, 1309460, 2029663, 2618920, 4059326, 8118652, 10148315, 16237304, 20296630, 40593260, 81186520]

約数ペア:

[(1, 81186520), (2, 40593260), (4, 20296630), (5, 16237304), (8, 10148315), (10, 8118652), (20, 4059326), (31, 2618920), (40, 2029663), (62, 1309460), (124, 654730), (155, 523784), (233, 348440), (248, 327365), (281, 288920), (310, 261892), (466, 174220), (562, 144460), (620, 130946), (932, 87110), (1124, 72230), (1165, 69688), (1240, 65473), (1405, 57784), (1864, 43555), (2248, 36115), (2330, 34844), (2810, 28892), (4660, 17422), (5620, 14446), (7223, 11240), (8711, 9320)]