78906920

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{6343}}^1$

素因数の和:6665

約数の個数: 32

約数和(自身を含む): 178139520

約数和(自身を除く): 99232600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 3110, 6220, 6343, 12440, 12686, 25372, 31715, 50744, 63430, 126860, 253720, 1972673, 3945346, 7890692, 9863365, 15781384, 19726730, 39453460, 78906920]

約数ペア:

[(1, 78906920), (2, 39453460), (4, 19726730), (5, 15781384), (8, 9863365), (10, 7890692), (20, 3945346), (40, 1972673), (311, 253720), (622, 126860), (1244, 63430), (1555, 50744), (2488, 31715), (3110, 25372), (6220, 12686), (6343, 12440)]