81346120

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28643}}^1$

素因数の和:28725

約数の個数: 32

約数和(自身を含む): 185613120

約数和(自身を除く): 104267000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 28643, 57286, 114572, 143215, 229144, 286430, 572860, 1145720, 2033653, 4067306, 8134612, 10168265, 16269224, 20336530, 40673060, 81346120]

約数ペア:

[(1, 81346120), (2, 40673060), (4, 20336530), (5, 16269224), (8, 10168265), (10, 8134612), (20, 4067306), (40, 2033653), (71, 1145720), (142, 572860), (284, 286430), (355, 229144), (568, 143215), (710, 114572), (1420, 57286), (2840, 28643)]