81616840

素因数分解:

$2^3\times 5^1\times {\mathrm{179}}^1\times {\mathrm{11399}}^1$

素因数の和:11589

約数の個数: 32

約数和(自身を含む): 184680000

約数和(自身を除く): 103063160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 179, 358, 716, 895, 1432, 1790, 3580, 7160, 11399, 22798, 45596, 56995, 91192, 113990, 227980, 455960, 2040421, 4080842, 8161684, 10202105, 16323368, 20404210, 40808420, 81616840]

約数ペア:

[(1, 81616840), (2, 40808420), (4, 20404210), (5, 16323368), (8, 10202105), (10, 8161684), (20, 4080842), (40, 2040421), (179, 455960), (358, 227980), (716, 113990), (895, 91192), (1432, 56995), (1790, 45596), (3580, 22798), (7160, 11399)]