16880721

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{109}}^1$

素因数の和:174

約数の個数: 48

約数和(自身を含む): 28163520

約数和(自身を除く): 11282799

約数列:

[1, 3, 11, 13, 19, 33, 39, 57, 109, 143, 209, 247, 327, 361, 429, 627, 741, 1083, 1199, 1417, 2071, 2717, 3597, 3971, 4251, 4693, 6213, 8151, 11913, 14079, 15587, 22781, 26923, 39349, 46761, 51623, 68343, 80769, 118047, 154869, 296153, 432839, 511537, 888459, 1298517, 1534611, 5626907, 16880721]

約数ペア:

[(1, 16880721), (3, 5626907), (11, 1534611), (13, 1298517), (19, 888459), (33, 511537), (39, 432839), (57, 296153), (109, 154869), (143, 118047), (209, 80769), (247, 68343), (327, 51623), (361, 46761), (429, 39349), (627, 26923), (741, 22781), (1083, 15587), (1199, 14079), (1417, 11913), (2071, 8151), (2717, 6213), (3597, 4693), (3971, 4251)]