78428920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{32143}}^1$

素因数の和:32215

約数の個数: 32

約数和(自身を含む): 179363520

約数和(自身を除く): 100934600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 32143, 64286, 128572, 160715, 257144, 321430, 642860, 1285720, 1960723, 3921446, 7842892, 9803615, 15685784, 19607230, 39214460, 78428920]

約数ペア:

[(1, 78428920), (2, 39214460), (4, 19607230), (5, 15685784), (8, 9803615), (10, 7842892), (20, 3921446), (40, 1960723), (61, 1285720), (122, 642860), (244, 321430), (305, 257144), (488, 160715), (610, 128572), (1220, 64286), (2440, 32143)]