2780680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{9931}}^1$

素因数の和:9949

約数の個数: 32

約数和(自身を含む): 7151040

約数和(自身を除く): 4370360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 9931, 19862, 39724, 49655, 69517, 79448, 99310, 139034, 198620, 278068, 347585, 397240, 556136, 695170, 1390340, 2780680]

約数ペア:

[(1, 2780680), (2, 1390340), (4, 695170), (5, 556136), (7, 397240), (8, 347585), (10, 278068), (14, 198620), (20, 139034), (28, 99310), (35, 79448), (40, 69517), (56, 49655), (70, 39724), (140, 19862), (280, 9931)]