20028554

素因数分解:

$2^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 38304000

約数和(自身を除く): 18275446

約数列:

[1, 2, 7, 13, 14, 26, 49, 79, 91, 98, 158, 182, 199, 398, 553, 637, 1027, 1106, 1274, 1393, 2054, 2587, 2786, 3871, 5174, 7189, 7742, 9751, 14378, 15721, 18109, 19502, 31442, 36218, 50323, 100646, 110047, 126763, 204373, 220094, 253526, 408746, 770329, 1430611, 1540658, 2861222, 10014277, 20028554]

約数ペア:

[(1, 20028554), (2, 10014277), (7, 2861222), (13, 1540658), (14, 1430611), (26, 770329), (49, 408746), (79, 253526), (91, 220094), (98, 204373), (158, 126763), (182, 110047), (199, 100646), (398, 50323), (553, 36218), (637, 31442), (1027, 19502), (1106, 18109), (1274, 15721), (1393, 14378), (2054, 9751), (2587, 7742), (2786, 7189), (3871, 5174)]