20613856

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:335

約数の個数: 48

約数和(自身を含む): 42311808

約数和(自身を除く): 21697952

約数列:

[1, 2, 4, 8, 16, 32, 43, 71, 86, 142, 172, 211, 284, 344, 422, 568, 688, 844, 1136, 1376, 1688, 2272, 3053, 3376, 6106, 6752, 9073, 12212, 14981, 18146, 24424, 29962, 36292, 48848, 59924, 72584, 97696, 119848, 145168, 239696, 290336, 479392, 644183, 1288366, 2576732, 5153464, 10306928, 20613856]

約数ペア:

[(1, 20613856), (2, 10306928), (4, 5153464), (8, 2576732), (16, 1288366), (32, 644183), (43, 479392), (71, 290336), (86, 239696), (142, 145168), (172, 119848), (211, 97696), (284, 72584), (344, 59924), (422, 48848), (568, 36292), (688, 29962), (844, 24424), (1136, 18146), (1376, 14981), (1688, 12212), (2272, 9073), (3053, 6752), (3376, 6106)]