81983590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{139}}^1\times {\mathrm{349}}^1$

素因数の和:521

約数の個数: 48

約数和(自身を含む): 161406000

約数和(自身を除く): 79422410

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 139, 169, 278, 338, 349, 695, 698, 845, 1390, 1690, 1745, 1807, 3490, 3614, 4537, 9035, 9074, 18070, 22685, 23491, 45370, 46982, 48511, 58981, 97022, 117455, 117962, 234910, 242555, 294905, 485110, 589810, 630643, 1261286, 3153215, 6306430, 8198359, 16396718, 40991795, 81983590]

約数ペア:

[(1, 81983590), (2, 40991795), (5, 16396718), (10, 8198359), (13, 6306430), (26, 3153215), (65, 1261286), (130, 630643), (139, 589810), (169, 485110), (278, 294905), (338, 242555), (349, 234910), (695, 117962), (698, 117455), (845, 97022), (1390, 58981), (1690, 48511), (1745, 46982), (1807, 45370), (3490, 23491), (3614, 22685), (4537, 18070), (9035, 9074)]