18970720

素因数分解:

$2^5\times 5^1\times {\mathrm{139}}^1\times {\mathrm{853}}^1$

素因数の和:1007

約数の個数: 48

約数和(自身を含む): 45193680

約数和(自身を除く): 26222960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 139, 160, 278, 556, 695, 853, 1112, 1390, 1706, 2224, 2780, 3412, 4265, 4448, 5560, 6824, 8530, 11120, 13648, 17060, 22240, 27296, 34120, 68240, 118567, 136480, 237134, 474268, 592835, 948536, 1185670, 1897072, 2371340, 3794144, 4742680, 9485360, 18970720]

約数ペア:

[(1, 18970720), (2, 9485360), (4, 4742680), (5, 3794144), (8, 2371340), (10, 1897072), (16, 1185670), (20, 948536), (32, 592835), (40, 474268), (80, 237134), (139, 136480), (160, 118567), (278, 68240), (556, 34120), (695, 27296), (853, 22240), (1112, 17060), (1390, 13648), (1706, 11120), (2224, 8530), (2780, 6824), (3412, 5560), (4265, 4448)]