261213820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{43391}}^1$

素因数の和:43450

約数の個数: 48

約数和(自身を含む): 641507328

約数和(自身を除く): 380293508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 6020, 43391, 86782, 173564, 216955, 303737, 433910, 607474, 867820, 1214948, 1518685, 1865813, 3037370, 3731626, 6074740, 7463252, 9329065, 13060691, 18658130, 26121382, 37316260, 52242764, 65303455, 130606910, 261213820]

約数ペア:

[(1, 261213820), (2, 130606910), (4, 65303455), (5, 52242764), (7, 37316260), (10, 26121382), (14, 18658130), (20, 13060691), (28, 9329065), (35, 7463252), (43, 6074740), (70, 3731626), (86, 3037370), (140, 1865813), (172, 1518685), (215, 1214948), (301, 867820), (430, 607474), (602, 433910), (860, 303737), (1204, 216955), (1505, 173564), (3010, 86782), (6020, 43391)]