21657780

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{461}}^1$

素因数の和:511

約数の個数: 120

約数和(自身を含む): 70436520

約数和(自身を除く): 48778740

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 29, 30, 36, 45, 54, 58, 60, 81, 87, 90, 108, 116, 135, 145, 162, 174, 180, 261, 270, 290, 324, 348, 405, 435, 461, 522, 540, 580, 783, 810, 870, 922, 1044, 1305, 1383, 1566, 1620, 1740, 1844, 2305, 2349, 2610, 2766, 3132, 3915, 4149, 4610, 4698, 5220, 5532, 6915, 7830, 8298, 9220, 9396, 11745, 12447, 13369, 13830, 15660, 16596, 20745, 23490, 24894, 26738, 27660, 37341, 40107, 41490, 46980, 49788, 53476, 62235, 66845, 74682, 80214, 82980, 120321, 124470, 133690, 149364, 160428, 186705, 200535, 240642, 248940, 267380, 360963, 373410, 401070, 481284, 601605, 721926, 746820, 802140, 1082889, 1203210, 1443852, 1804815, 2165778, 2406420, 3609630, 4331556, 5414445, 7219260, 10828890, 21657780]

約数ペア:

[(1, 21657780), (2, 10828890), (3, 7219260), (4, 5414445), (5, 4331556), (6, 3609630), (9, 2406420), (10, 2165778), (12, 1804815), (15, 1443852), (18, 1203210), (20, 1082889), (27, 802140), (29, 746820), (30, 721926), (36, 601605), (45, 481284), (54, 401070), (58, 373410), (60, 360963), (81, 267380), (87, 248940), (90, 240642), (108, 200535), (116, 186705), (135, 160428), (145, 149364), (162, 133690), (174, 124470), (180, 120321), (261, 82980), (270, 80214), (290, 74682), (324, 66845), (348, 62235), (405, 53476), (435, 49788), (461, 46980), (522, 41490), (540, 40107), (580, 37341), (783, 27660), (810, 26738), (870, 24894), (922, 23490), (1044, 20745), (1305, 16596), (1383, 15660), (1566, 13830), (1620, 13369), (1740, 12447), (1844, 11745), (2305, 9396), (2349, 9220), (2610, 8298), (2766, 7830), (3132, 6915), (3915, 5532), (4149, 5220), (4610, 4698)]