21314920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{251}}^1$

素因数の和:466

約数の個数: 64

約数和(自身を含む): 52799040

約数和(自身を除く): 31484120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 193, 220, 251, 386, 440, 502, 772, 965, 1004, 1255, 1544, 1930, 2008, 2123, 2510, 2761, 3860, 4246, 5020, 5522, 7720, 8492, 10040, 10615, 11044, 13805, 16984, 21230, 22088, 27610, 42460, 48443, 55220, 84920, 96886, 110440, 193772, 242215, 387544, 484430, 532873, 968860, 1065746, 1937720, 2131492, 2664365, 4262984, 5328730, 10657460, 21314920]

約数ペア:

[(1, 21314920), (2, 10657460), (4, 5328730), (5, 4262984), (8, 2664365), (10, 2131492), (11, 1937720), (20, 1065746), (22, 968860), (40, 532873), (44, 484430), (55, 387544), (88, 242215), (110, 193772), (193, 110440), (220, 96886), (251, 84920), (386, 55220), (440, 48443), (502, 42460), (772, 27610), (965, 22088), (1004, 21230), (1255, 16984), (1544, 13805), (1930, 11044), (2008, 10615), (2123, 10040), (2510, 8492), (2761, 7720), (3860, 5522), (4246, 5020)]