81689840

素因数分解:

$2^4\times 5^1\times {\mathrm{1021123}}^1$

素因数の和:1021136

約数の個数: 20

約数和(自身を含む): 189929064

約数和(自身を除く): 108239224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1021123, 2042246, 4084492, 5105615, 8168984, 10211230, 16337968, 20422460, 40844920, 81689840]

約数ペア:

[(1, 81689840), (2, 40844920), (4, 20422460), (5, 16337968), (8, 10211230), (10, 8168984), (16, 5105615), (20, 4084492), (40, 2042246), (80, 1021123)]