77899660

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1\times {\mathrm{379}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 168537600

約数和(自身を除く): 90637940

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 239, 379, 430, 478, 758, 860, 956, 1195, 1516, 1895, 2390, 3790, 4780, 7580, 10277, 16297, 20554, 32594, 41108, 51385, 65188, 81485, 90581, 102770, 162970, 181162, 205540, 325940, 362324, 452905, 905810, 1811620, 3894983, 7789966, 15579932, 19474915, 38949830, 77899660]

約数ペア:

[(1, 77899660), (2, 38949830), (4, 19474915), (5, 15579932), (10, 7789966), (20, 3894983), (43, 1811620), (86, 905810), (172, 452905), (215, 362324), (239, 325940), (379, 205540), (430, 181162), (478, 162970), (758, 102770), (860, 90581), (956, 81485), (1195, 65188), (1516, 51385), (1895, 41108), (2390, 32594), (3790, 20554), (4780, 16297), (7580, 10277)]