81991376

素因数分解:

$2^4\times {\mathrm{991}}^1\times {\mathrm{5171}}^1$

素因数の和:6170

約数の個数: 20

約数和(自身を含む): 159049344

約数和(自身を除く): 77057968

約数列:

[1, 2, 4, 8, 16, 991, 1982, 3964, 5171, 7928, 10342, 15856, 20684, 41368, 82736, 5124461, 10248922, 20497844, 40995688, 81991376]

約数ペア:

[(1, 81991376), (2, 40995688), (4, 20497844), (8, 10248922), (16, 5124461), (991, 82736), (1982, 41368), (3964, 20684), (5171, 15856), (7928, 10342)]