221465781

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 345945600

約数和(自身を除く): 124479819

約数列:

[1, 3, 9, 23, 43, 69, 129, 139, 179, 207, 387, 417, 537, 989, 1251, 1611, 2967, 3197, 4117, 5977, 7697, 8901, 9591, 12351, 17931, 23091, 24881, 28773, 37053, 53793, 69273, 74643, 137471, 177031, 223929, 412413, 531093, 572263, 1069883, 1237239, 1593279, 1716789, 3209649, 5150367, 9628947, 24607309, 73821927, 221465781]

約数ペア:

[(1, 221465781), (3, 73821927), (9, 24607309), (23, 9628947), (43, 5150367), (69, 3209649), (129, 1716789), (139, 1593279), (179, 1237239), (207, 1069883), (387, 572263), (417, 531093), (537, 412413), (989, 223929), (1251, 177031), (1611, 137471), (2967, 74643), (3197, 69273), (4117, 53793), (5977, 37053), (7697, 28773), (8901, 24881), (9591, 23091), (12351, 17931)]