21408840

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{461}}^1$

素因数の和:524

約数の個数: 128

約数和(自身を含む): 73180800

約数和(自身を除く): 51771960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 43, 45, 54, 60, 72, 86, 90, 108, 120, 129, 135, 172, 180, 215, 216, 258, 270, 344, 360, 387, 430, 461, 516, 540, 645, 774, 860, 922, 1032, 1080, 1161, 1290, 1383, 1548, 1720, 1844, 1935, 2305, 2322, 2580, 2766, 3096, 3688, 3870, 4149, 4610, 4644, 5160, 5532, 5805, 6915, 7740, 8298, 9220, 9288, 11064, 11610, 12447, 13830, 15480, 16596, 18440, 19823, 20745, 23220, 24894, 27660, 33192, 39646, 41490, 46440, 49788, 55320, 59469, 62235, 79292, 82980, 99115, 99576, 118938, 124470, 158584, 165960, 178407, 198230, 237876, 248940, 297345, 356814, 396460, 475752, 497880, 535221, 594690, 713628, 792920, 892035, 1070442, 1189380, 1427256, 1784070, 2140884, 2378760, 2676105, 3568140, 4281768, 5352210, 7136280, 10704420, 21408840]

約数ペア:

[(1, 21408840), (2, 10704420), (3, 7136280), (4, 5352210), (5, 4281768), (6, 3568140), (8, 2676105), (9, 2378760), (10, 2140884), (12, 1784070), (15, 1427256), (18, 1189380), (20, 1070442), (24, 892035), (27, 792920), (30, 713628), (36, 594690), (40, 535221), (43, 497880), (45, 475752), (54, 396460), (60, 356814), (72, 297345), (86, 248940), (90, 237876), (108, 198230), (120, 178407), (129, 165960), (135, 158584), (172, 124470), (180, 118938), (215, 99576), (216, 99115), (258, 82980), (270, 79292), (344, 62235), (360, 59469), (387, 55320), (430, 49788), (461, 46440), (516, 41490), (540, 39646), (645, 33192), (774, 27660), (860, 24894), (922, 23220), (1032, 20745), (1080, 19823), (1161, 18440), (1290, 16596), (1383, 15480), (1548, 13830), (1720, 12447), (1844, 11610), (1935, 11064), (2305, 9288), (2322, 9220), (2580, 8298), (2766, 7740), (3096, 6915), (3688, 5805), (3870, 5532), (4149, 5160), (4610, 4644)]