12781240

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{1847}}^1$

素因数の和:2031

約数の個数: 32

約数和(自身を含む): 28939680

約数和(自身を除く): 16158440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 1847, 3460, 3694, 6920, 7388, 9235, 14776, 18470, 36940, 73880, 319531, 639062, 1278124, 1597655, 2556248, 3195310, 6390620, 12781240]

約数ペア:

[(1, 12781240), (2, 6390620), (4, 3195310), (5, 2556248), (8, 1597655), (10, 1278124), (20, 639062), (40, 319531), (173, 73880), (346, 36940), (692, 18470), (865, 14776), (1384, 9235), (1730, 7388), (1847, 6920), (3460, 3694)]