18943984

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{271}}^1$

素因数の和:553

約数の個数: 40

約数和(自身を含む): 39158208

約数和(自身を除く): 20214224

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 257, 271, 272, 514, 542, 1028, 1084, 2056, 2168, 4112, 4336, 4369, 4607, 8738, 9214, 17476, 18428, 34952, 36856, 69647, 69904, 73712, 139294, 278588, 557176, 1114352, 1183999, 2367998, 4735996, 9471992, 18943984]

約数ペア:

[(1, 18943984), (2, 9471992), (4, 4735996), (8, 2367998), (16, 1183999), (17, 1114352), (34, 557176), (68, 278588), (136, 139294), (257, 73712), (271, 69904), (272, 69647), (514, 36856), (542, 34952), (1028, 18428), (1084, 17476), (2056, 9214), (2168, 8738), (4112, 4607), (4336, 4369)]