81247840

素因数分解:

$2^5\times 5^1\times {\mathrm{227}}^1\times {\mathrm{2237}}^1$

素因数の和:2479

約数の個数: 48

約数和(自身を含む): 192879792

約数和(自身を除く): 111631952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 227, 454, 908, 1135, 1816, 2237, 2270, 3632, 4474, 4540, 7264, 8948, 9080, 11185, 17896, 18160, 22370, 35792, 36320, 44740, 71584, 89480, 178960, 357920, 507799, 1015598, 2031196, 2538995, 4062392, 5077990, 8124784, 10155980, 16249568, 20311960, 40623920, 81247840]

約数ペア:

[(1, 81247840), (2, 40623920), (4, 20311960), (5, 16249568), (8, 10155980), (10, 8124784), (16, 5077990), (20, 4062392), (32, 2538995), (40, 2031196), (80, 1015598), (160, 507799), (227, 357920), (454, 178960), (908, 89480), (1135, 71584), (1816, 44740), (2237, 36320), (2270, 35792), (3632, 22370), (4474, 18160), (4540, 17896), (7264, 11185), (8948, 9080)]