18987920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{827}}^1$

素因数の和:888

約数の個数: 80

約数和(自身を含む): 51746688

約数和(自身を除く): 32758768

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 41, 56, 70, 80, 82, 112, 140, 164, 205, 280, 287, 328, 410, 560, 574, 656, 820, 827, 1148, 1435, 1640, 1654, 2296, 2870, 3280, 3308, 4135, 4592, 5740, 5789, 6616, 8270, 11480, 11578, 13232, 16540, 22960, 23156, 28945, 33080, 33907, 46312, 57890, 66160, 67814, 92624, 115780, 135628, 169535, 231560, 237349, 271256, 339070, 463120, 474698, 542512, 678140, 949396, 1186745, 1356280, 1898792, 2373490, 2712560, 3797584, 4746980, 9493960, 18987920]

約数ペア:

[(1, 18987920), (2, 9493960), (4, 4746980), (5, 3797584), (7, 2712560), (8, 2373490), (10, 1898792), (14, 1356280), (16, 1186745), (20, 949396), (28, 678140), (35, 542512), (40, 474698), (41, 463120), (56, 339070), (70, 271256), (80, 237349), (82, 231560), (112, 169535), (140, 135628), (164, 115780), (205, 92624), (280, 67814), (287, 66160), (328, 57890), (410, 46312), (560, 33907), (574, 33080), (656, 28945), (820, 23156), (827, 22960), (1148, 16540), (1435, 13232), (1640, 11578), (1654, 11480), (2296, 8270), (2870, 6616), (3280, 5789), (3308, 5740), (4135, 4592)]