21190840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2833}}^1$

素因数の和:2872

約数の個数: 64

約数和(自身を含む): 55092960

約数和(自身を除く): 33902120

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 55, 68, 85, 88, 110, 136, 170, 187, 220, 340, 374, 440, 680, 748, 935, 1496, 1870, 2833, 3740, 5666, 7480, 11332, 14165, 22664, 28330, 31163, 48161, 56660, 62326, 96322, 113320, 124652, 155815, 192644, 240805, 249304, 311630, 385288, 481610, 529771, 623260, 963220, 1059542, 1246520, 1926440, 2119084, 2648855, 4238168, 5297710, 10595420, 21190840]

約数ペア:

[(1, 21190840), (2, 10595420), (4, 5297710), (5, 4238168), (8, 2648855), (10, 2119084), (11, 1926440), (17, 1246520), (20, 1059542), (22, 963220), (34, 623260), (40, 529771), (44, 481610), (55, 385288), (68, 311630), (85, 249304), (88, 240805), (110, 192644), (136, 155815), (170, 124652), (187, 113320), (220, 96322), (340, 62326), (374, 56660), (440, 48161), (680, 31163), (748, 28330), (935, 22664), (1496, 14165), (1870, 11332), (2833, 7480), (3740, 5666)]