20475021

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{691}}^1$

素因数の和:801

約数の個数: 32

約数和(自身を含む): 33481728

約数和(自身を除く): 13006707

約数列:

[1, 3, 7, 17, 21, 51, 83, 119, 249, 357, 581, 691, 1411, 1743, 2073, 4233, 4837, 9877, 11747, 14511, 29631, 35241, 57353, 82229, 172059, 246687, 401471, 975001, 1204413, 2925003, 6825007, 20475021]

約数ペア:

[(1, 20475021), (3, 6825007), (7, 2925003), (17, 1204413), (21, 975001), (51, 401471), (83, 246687), (119, 172059), (249, 82229), (357, 57353), (581, 35241), (691, 29631), (1411, 14511), (1743, 11747), (2073, 9877), (4233, 4837)]