28217205

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{199}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 51667200

約数和(自身を除く): 23449995

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 137, 199, 207, 345, 411, 597, 685, 995, 1035, 1233, 1791, 2055, 2985, 3151, 4577, 6165, 8955, 9453, 13731, 15755, 22885, 27263, 28359, 41193, 47265, 68655, 81789, 136315, 141795, 205965, 245367, 408945, 627049, 1226835, 1881147, 3135245, 5643441, 9405735, 28217205]

約数ペア:

[(1, 28217205), (3, 9405735), (5, 5643441), (9, 3135245), (15, 1881147), (23, 1226835), (45, 627049), (69, 408945), (115, 245367), (137, 205965), (199, 141795), (207, 136315), (345, 81789), (411, 68655), (597, 47265), (685, 41193), (995, 28359), (1035, 27263), (1233, 22885), (1791, 15755), (2055, 13731), (2985, 9453), (3151, 8955), (4577, 6165)]