21643020

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{193}}^1$

素因数の和:304

約数の個数: 144

約数和(自身を含む): 76265280

約数和(自身を除く): 54622260

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 89, 90, 105, 126, 140, 178, 180, 193, 210, 252, 267, 315, 356, 386, 420, 445, 534, 579, 623, 630, 772, 801, 890, 965, 1068, 1158, 1246, 1260, 1335, 1351, 1602, 1737, 1780, 1869, 1930, 2316, 2492, 2670, 2702, 2895, 3115, 3204, 3474, 3738, 3860, 4005, 4053, 5340, 5404, 5607, 5790, 6230, 6755, 6948, 7476, 8010, 8106, 8685, 9345, 11214, 11580, 12159, 12460, 13510, 16020, 16212, 17177, 17370, 18690, 20265, 22428, 24318, 27020, 28035, 34354, 34740, 37380, 40530, 48636, 51531, 56070, 60795, 68708, 81060, 85885, 103062, 112140, 120239, 121590, 154593, 171770, 206124, 240478, 243180, 257655, 309186, 343540, 360717, 480956, 515310, 601195, 618372, 721434, 772965, 1030620, 1082151, 1202390, 1442868, 1545930, 1803585, 2164302, 2404780, 3091860, 3607170, 4328604, 5410755, 7214340, 10821510, 21643020]

約数ペア:

[(1, 21643020), (2, 10821510), (3, 7214340), (4, 5410755), (5, 4328604), (6, 3607170), (7, 3091860), (9, 2404780), (10, 2164302), (12, 1803585), (14, 1545930), (15, 1442868), (18, 1202390), (20, 1082151), (21, 1030620), (28, 772965), (30, 721434), (35, 618372), (36, 601195), (42, 515310), (45, 480956), (60, 360717), (63, 343540), (70, 309186), (84, 257655), (89, 243180), (90, 240478), (105, 206124), (126, 171770), (140, 154593), (178, 121590), (180, 120239), (193, 112140), (210, 103062), (252, 85885), (267, 81060), (315, 68708), (356, 60795), (386, 56070), (420, 51531), (445, 48636), (534, 40530), (579, 37380), (623, 34740), (630, 34354), (772, 28035), (801, 27020), (890, 24318), (965, 22428), (1068, 20265), (1158, 18690), (1246, 17370), (1260, 17177), (1335, 16212), (1351, 16020), (1602, 13510), (1737, 12460), (1780, 12159), (1869, 11580), (1930, 11214), (2316, 9345), (2492, 8685), (2670, 8106), (2702, 8010), (2895, 7476), (3115, 6948), (3204, 6755), (3474, 6230), (3738, 5790), (3860, 5607), (4005, 5404), (4053, 5340)]