20721020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1759}}^1$

素因数の和:1818

約数の個数: 48

約数和(自身を含む): 47308800

約数和(自身を除く): 26587780

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 38, 62, 76, 95, 124, 155, 190, 310, 380, 589, 620, 1178, 1759, 2356, 2945, 3518, 5890, 7036, 8795, 11780, 17590, 33421, 35180, 54529, 66842, 109058, 133684, 167105, 218116, 272645, 334210, 545290, 668420, 1036051, 1090580, 2072102, 4144204, 5180255, 10360510, 20721020]

約数ペア:

[(1, 20721020), (2, 10360510), (4, 5180255), (5, 4144204), (10, 2072102), (19, 1090580), (20, 1036051), (31, 668420), (38, 545290), (62, 334210), (76, 272645), (95, 218116), (124, 167105), (155, 133684), (190, 109058), (310, 66842), (380, 54529), (589, 35180), (620, 33421), (1178, 17590), (1759, 11780), (2356, 8795), (2945, 7036), (3518, 5890)]