20587420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{479}}^1$

素因数の和:802

約数の個数: 48

約数和(自身を含む): 49674240

約数和(自身を除く): 29086820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 307, 479, 614, 958, 1228, 1535, 1916, 2149, 2395, 3070, 3353, 4298, 4790, 6140, 6706, 8596, 9580, 10745, 13412, 16765, 21490, 33530, 42980, 67060, 147053, 294106, 588212, 735265, 1029371, 1470530, 2058742, 2941060, 4117484, 5146855, 10293710, 20587420]

約数ペア:

[(1, 20587420), (2, 10293710), (4, 5146855), (5, 4117484), (7, 2941060), (10, 2058742), (14, 1470530), (20, 1029371), (28, 735265), (35, 588212), (70, 294106), (140, 147053), (307, 67060), (479, 42980), (614, 33530), (958, 21490), (1228, 16765), (1535, 13412), (1916, 10745), (2149, 9580), (2395, 8596), (3070, 6706), (3353, 6140), (4298, 4790)]