81880720

素因数分解:

$2^4\times 5^1\times {\mathrm{359}}^1\times {\mathrm{2851}}^1$

素因数の和:3223

約数の個数: 40

約数和(自身を含む): 190969920

約数和(自身を除く): 109089200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 359, 718, 1436, 1795, 2851, 2872, 3590, 5702, 5744, 7180, 11404, 14255, 14360, 22808, 28510, 28720, 45616, 57020, 114040, 228080, 1023509, 2047018, 4094036, 5117545, 8188072, 10235090, 16376144, 20470180, 40940360, 81880720]

約数ペア:

[(1, 81880720), (2, 40940360), (4, 20470180), (5, 16376144), (8, 10235090), (10, 8188072), (16, 5117545), (20, 4094036), (40, 2047018), (80, 1023509), (359, 228080), (718, 114040), (1436, 57020), (1795, 45616), (2851, 28720), (2872, 28510), (3590, 22808), (5702, 14360), (5744, 14255), (7180, 11404)]