278640405

素因数分解:

$3^4\times 5^1\times {\mathrm{397}}^1\times {\mathrm{1733}}^1$

素因数の和:2147

約数の個数: 40

約数和(自身を含む): 501035832

約数和(自身を除く): 222395427

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 397, 405, 1191, 1733, 1985, 3573, 5199, 5955, 8665, 10719, 15597, 17865, 25995, 32157, 46791, 53595, 77985, 140373, 160785, 233955, 688001, 701865, 2064003, 3440005, 6192009, 10320015, 18576027, 30960045, 55728081, 92880135, 278640405]

約数ペア:

[(1, 278640405), (3, 92880135), (5, 55728081), (9, 30960045), (15, 18576027), (27, 10320015), (45, 6192009), (81, 3440005), (135, 2064003), (397, 701865), (405, 688001), (1191, 233955), (1733, 160785), (1985, 140373), (3573, 77985), (5199, 53595), (5955, 46791), (8665, 32157), (10719, 25995), (15597, 17865)]