21398865

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1\times {\mathrm{239}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 35389440

約数和(自身を除く): 13990575

約数列:

[1, 3, 5, 15, 47, 127, 141, 235, 239, 381, 635, 705, 717, 1195, 1905, 3585, 5969, 11233, 17907, 29845, 30353, 33699, 56165, 89535, 91059, 151765, 168495, 455295, 1426591, 4279773, 7132955, 21398865]

約数ペア:

[(1, 21398865), (3, 7132955), (5, 4279773), (15, 1426591), (47, 455295), (127, 168495), (141, 151765), (235, 91059), (239, 89535), (381, 56165), (635, 33699), (705, 30353), (717, 29845), (1195, 17907), (1905, 11233), (3585, 5969)]