81864400

素因数分解:

$2^4\times 5^2\times {\mathrm{103}}^1\times {\mathrm{1987}}^1$

素因数の和:2108

約数の個数: 60

約数和(自身を含む): 198688672

約数和(自身を除く): 116824272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 103, 200, 206, 400, 412, 515, 824, 1030, 1648, 1987, 2060, 2575, 3974, 4120, 5150, 7948, 8240, 9935, 10300, 15896, 19870, 20600, 31792, 39740, 41200, 49675, 79480, 99350, 158960, 198700, 204661, 397400, 409322, 794800, 818644, 1023305, 1637288, 2046610, 3274576, 4093220, 5116525, 8186440, 10233050, 16372880, 20466100, 40932200, 81864400]

約数ペア:

[(1, 81864400), (2, 40932200), (4, 20466100), (5, 16372880), (8, 10233050), (10, 8186440), (16, 5116525), (20, 4093220), (25, 3274576), (40, 2046610), (50, 1637288), (80, 1023305), (100, 818644), (103, 794800), (200, 409322), (206, 397400), (400, 204661), (412, 198700), (515, 158960), (824, 99350), (1030, 79480), (1648, 49675), (1987, 41200), (2060, 39740), (2575, 31792), (3974, 20600), (4120, 19870), (5150, 15896), (7948, 10300), (8240, 9935)]