1390340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{9931}}^1$

素因数の和:9947

約数の個数: 24

約数和(自身を含む): 3337152

約数和(自身を除く): 1946812

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 9931, 19862, 39724, 49655, 69517, 99310, 139034, 198620, 278068, 347585, 695170, 1390340]

約数ペア:

[(1, 1390340), (2, 695170), (4, 347585), (5, 278068), (7, 198620), (10, 139034), (14, 99310), (20, 69517), (28, 49655), (35, 39724), (70, 19862), (140, 9931)]