21330880

素因数分解:

$2^6\times 5^1\times {\mathrm{191}}^1\times {\mathrm{349}}^1$

素因数の和:557

約数の個数: 56

約数和(自身を含む): 51206400

約数和(自身を除く): 29875520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 191, 320, 349, 382, 698, 764, 955, 1396, 1528, 1745, 1910, 2792, 3056, 3490, 3820, 5584, 6112, 6980, 7640, 11168, 12224, 13960, 15280, 22336, 27920, 30560, 55840, 61120, 66659, 111680, 133318, 266636, 333295, 533272, 666590, 1066544, 1333180, 2133088, 2666360, 4266176, 5332720, 10665440, 21330880]

約数ペア:

[(1, 21330880), (2, 10665440), (4, 5332720), (5, 4266176), (8, 2666360), (10, 2133088), (16, 1333180), (20, 1066544), (32, 666590), (40, 533272), (64, 333295), (80, 266636), (160, 133318), (191, 111680), (320, 66659), (349, 61120), (382, 55840), (698, 30560), (764, 27920), (955, 22336), (1396, 15280), (1528, 13960), (1745, 12224), (1910, 11168), (2792, 7640), (3056, 6980), (3490, 6112), (3820, 5584)]