20424280

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7621}}^1$

素因数の和:7699

約数の個数: 32

約数和(自身を含む): 46646640

約数和(自身を除く): 26222360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7621, 15242, 30484, 38105, 60968, 76210, 152420, 304840, 510607, 1021214, 2042428, 2553035, 4084856, 5106070, 10212140, 20424280]

約数ペア:

[(1, 20424280), (2, 10212140), (4, 5106070), (5, 4084856), (8, 2553035), (10, 2042428), (20, 1021214), (40, 510607), (67, 304840), (134, 152420), (268, 76210), (335, 60968), (536, 38105), (670, 30484), (1340, 15242), (2680, 7621)]