80647760

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6421}}^1$

素因数の和:6591

約数の個数: 40

約数和(自身を含む): 188729736

約数和(自身を除く): 108081976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 2512, 3140, 6280, 6421, 12560, 12842, 25684, 32105, 51368, 64210, 102736, 128420, 256840, 513680, 1008097, 2016194, 4032388, 5040485, 8064776, 10080970, 16129552, 20161940, 40323880, 80647760]

約数ペア:

[(1, 80647760), (2, 40323880), (4, 20161940), (5, 16129552), (8, 10080970), (10, 8064776), (16, 5040485), (20, 4032388), (40, 2016194), (80, 1008097), (157, 513680), (314, 256840), (628, 128420), (785, 102736), (1256, 64210), (1570, 51368), (2512, 32105), (3140, 25684), (6280, 12842), (6421, 12560)]