77709440

素因数分解:

$2^7\times 5^1\times {\mathrm{121421}}^1$

素因数の和:121440

約数の個数: 32

約数和(自身を含む): 185775660

約数和(自身を除く): 108066220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 121421, 242842, 485684, 607105, 971368, 1214210, 1942736, 2428420, 3885472, 4856840, 7770944, 9713680, 15541888, 19427360, 38854720, 77709440]

約数ペア:

[(1, 77709440), (2, 38854720), (4, 19427360), (5, 15541888), (8, 9713680), (10, 7770944), (16, 4856840), (20, 3885472), (32, 2428420), (40, 1942736), (64, 1214210), (80, 971368), (128, 607105), (160, 485684), (320, 242842), (640, 121421)]