19681844

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{389}}^1$

素因数の和:552

約数の個数: 48

約数和(自身を含む): 42806400

約数和(自身を除く): 23124556

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 139, 182, 278, 364, 389, 556, 778, 973, 1556, 1807, 1946, 2723, 3614, 3892, 5057, 5446, 7228, 10114, 10892, 12649, 20228, 25298, 35399, 50596, 54071, 70798, 108142, 141596, 216284, 378497, 702923, 756994, 1405846, 1513988, 2811692, 4920461, 9840922, 19681844]

約数ペア:

[(1, 19681844), (2, 9840922), (4, 4920461), (7, 2811692), (13, 1513988), (14, 1405846), (26, 756994), (28, 702923), (52, 378497), (91, 216284), (139, 141596), (182, 108142), (278, 70798), (364, 54071), (389, 50596), (556, 35399), (778, 25298), (973, 20228), (1556, 12649), (1807, 10892), (1946, 10114), (2723, 7228), (3614, 5446), (3892, 5057)]