20381256

素因数分解:

$2^3\times 3^2\times 7^2\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:188

約数の個数: 144

約数和(自身を含む): 66023100

約数和(自身を除く): 45641844

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 49, 53, 56, 63, 72, 84, 98, 106, 109, 126, 147, 159, 168, 196, 212, 218, 252, 294, 318, 327, 371, 392, 424, 436, 441, 477, 504, 588, 636, 654, 742, 763, 872, 882, 954, 981, 1113, 1176, 1272, 1308, 1484, 1526, 1764, 1908, 1962, 2226, 2289, 2597, 2616, 2968, 3052, 3339, 3528, 3816, 3924, 4452, 4578, 5194, 5341, 5777, 6104, 6678, 6867, 7791, 7848, 8904, 9156, 10388, 10682, 11554, 13356, 13734, 15582, 16023, 17331, 18312, 20776, 21364, 23108, 23373, 26712, 27468, 31164, 32046, 34662, 40439, 42728, 46216, 46746, 48069, 51993, 54936, 62328, 64092, 69324, 80878, 93492, 96138, 103986, 121317, 128184, 138648, 161756, 186984, 192276, 207972, 242634, 283073, 323512, 363951, 384552, 415944, 485268, 566146, 727902, 849219, 970536, 1132292, 1455804, 1698438, 2264584, 2547657, 2911608, 3396876, 5095314, 6793752, 10190628, 20381256]

約数ペア:

[(1, 20381256), (2, 10190628), (3, 6793752), (4, 5095314), (6, 3396876), (7, 2911608), (8, 2547657), (9, 2264584), (12, 1698438), (14, 1455804), (18, 1132292), (21, 970536), (24, 849219), (28, 727902), (36, 566146), (42, 485268), (49, 415944), (53, 384552), (56, 363951), (63, 323512), (72, 283073), (84, 242634), (98, 207972), (106, 192276), (109, 186984), (126, 161756), (147, 138648), (159, 128184), (168, 121317), (196, 103986), (212, 96138), (218, 93492), (252, 80878), (294, 69324), (318, 64092), (327, 62328), (371, 54936), (392, 51993), (424, 48069), (436, 46746), (441, 46216), (477, 42728), (504, 40439), (588, 34662), (636, 32046), (654, 31164), (742, 27468), (763, 26712), (872, 23373), (882, 23108), (954, 21364), (981, 20776), (1113, 18312), (1176, 17331), (1272, 16023), (1308, 15582), (1484, 13734), (1526, 13356), (1764, 11554), (1908, 10682), (1962, 10388), (2226, 9156), (2289, 8904), (2597, 7848), (2616, 7791), (2968, 6867), (3052, 6678), (3339, 6104), (3528, 5777), (3816, 5341), (3924, 5194), (4452, 4578)]