21031840

素因数分解:

$2^5\times 5^1\times {\mathrm{131449}}^1$

素因数の和:131464

約数の個数: 24

約数和(自身を含む): 49688100

約数和(自身を除く): 28656260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 131449, 262898, 525796, 657245, 1051592, 1314490, 2103184, 2628980, 4206368, 5257960, 10515920, 21031840]

約数ペア:

[(1, 21031840), (2, 10515920), (4, 5257960), (5, 4206368), (8, 2628980), (10, 2103184), (16, 1314490), (20, 1051592), (32, 657245), (40, 525796), (80, 262898), (160, 131449)]