12780820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{49157}}^1$

素因数の和:49179

約数の個数: 24

約数和(自身を含む): 28904904

約数和(自身を除く): 16124084

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 49157, 98314, 196628, 245785, 491570, 639041, 983140, 1278082, 2556164, 3195205, 6390410, 12780820]

約数ペア:

[(1, 12780820), (2, 6390410), (4, 3195205), (5, 2556164), (10, 1278082), (13, 983140), (20, 639041), (26, 491570), (52, 245785), (65, 196628), (130, 98314), (260, 49157)]