128420953040

素因数分解:

$2^4\times 5^1\times {\mathrm{1605261913}}^1$

素因数の和:1605261926

約数の個数: 20

約数和(自身を含む): 298578716004

約数和(自身を除く): 170157762964

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1605261913, 3210523826, 6421047652, 8026309565, 12842095304, 16052619130, 25684190608, 32105238260, 64210476520, 128420953040]

約数ペア:

[(1, 128420953040), (2, 64210476520), (4, 32105238260), (5, 25684190608), (8, 16052619130), (10, 12842095304), (16, 8026309565), (20, 6421047652), (40, 3210523826), (80, 1605261913)]