20129494

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{263}}^1$

素因数の和:361

約数の個数: 48

約数和(自身を含む): 39004416

約数和(自身を除く): 18874922

約数列:

[1, 2, 7, 11, 14, 22, 49, 71, 77, 98, 142, 154, 263, 497, 526, 539, 781, 994, 1078, 1562, 1841, 2893, 3479, 3682, 5467, 5786, 6958, 10934, 12887, 18673, 20251, 25774, 37346, 38269, 40502, 76538, 130711, 141757, 205403, 261422, 283514, 410806, 914977, 1437821, 1829954, 2875642, 10064747, 20129494]

約数ペア:

[(1, 20129494), (2, 10064747), (7, 2875642), (11, 1829954), (14, 1437821), (22, 914977), (49, 410806), (71, 283514), (77, 261422), (98, 205403), (142, 141757), (154, 130711), (263, 76538), (497, 40502), (526, 38269), (539, 37346), (781, 25774), (994, 20251), (1078, 18673), (1562, 12887), (1841, 10934), (2893, 6958), (3479, 5786), (3682, 5467)]