19780124

素因数分解:

$2^2\times 7^3\times {\mathrm{13}}^1\times {\mathrm{1109}}^1$

素因数の和:1147

約数の個数: 48

約数和(自身を含む): 43512000

約数和(自身を除く): 23731876

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 91, 98, 182, 196, 343, 364, 637, 686, 1109, 1274, 1372, 2218, 2548, 4436, 4459, 7763, 8918, 14417, 15526, 17836, 28834, 31052, 54341, 57668, 100919, 108682, 201838, 217364, 380387, 403676, 706433, 760774, 1412866, 1521548, 2825732, 4945031, 9890062, 19780124]

約数ペア:

[(1, 19780124), (2, 9890062), (4, 4945031), (7, 2825732), (13, 1521548), (14, 1412866), (26, 760774), (28, 706433), (49, 403676), (52, 380387), (91, 217364), (98, 201838), (182, 108682), (196, 100919), (343, 57668), (364, 54341), (637, 31052), (686, 28834), (1109, 17836), (1274, 15526), (1372, 14417), (2218, 8918), (2548, 7763), (4436, 4459)]