18840020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1153}}^1$

素因数の和:1224

約数の個数: 48

約数和(自身を含む): 42651840

約数和(自身を除く): 23811820

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1153, 1634, 2306, 3268, 4085, 4612, 5765, 8170, 11530, 16340, 21907, 23060, 43814, 49579, 87628, 99158, 109535, 198316, 219070, 247895, 438140, 495790, 942001, 991580, 1884002, 3768004, 4710005, 9420010, 18840020]

約数ペア:

[(1, 18840020), (2, 9420010), (4, 4710005), (5, 3768004), (10, 1884002), (19, 991580), (20, 942001), (38, 495790), (43, 438140), (76, 247895), (86, 219070), (95, 198316), (172, 109535), (190, 99158), (215, 87628), (380, 49579), (430, 43814), (817, 23060), (860, 21907), (1153, 16340), (1634, 11530), (2306, 8170), (3268, 5765), (4085, 4612)]