19803212

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{389}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 41277600

約数和(自身を除く): 21474388

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 89, 143, 178, 286, 356, 389, 572, 778, 979, 1157, 1556, 1958, 2314, 3916, 4279, 4628, 5057, 8558, 10114, 12727, 17116, 20228, 25454, 34621, 50908, 55627, 69242, 111254, 138484, 222508, 380831, 450073, 761662, 900146, 1523324, 1800292, 4950803, 9901606, 19803212]

約数ペア:

[(1, 19803212), (2, 9901606), (4, 4950803), (11, 1800292), (13, 1523324), (22, 900146), (26, 761662), (44, 450073), (52, 380831), (89, 222508), (143, 138484), (178, 111254), (286, 69242), (356, 55627), (389, 50908), (572, 34621), (778, 25454), (979, 20228), (1157, 17116), (1556, 12727), (1958, 10114), (2314, 8558), (3916, 5057), (4279, 4628)]