21172480

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1$

素因数の和:184

約数の個数: 144

約数和(自身を含む): 61810560

約数和(自身を除く): 40638080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 56, 64, 68, 70, 80, 85, 112, 119, 128, 136, 139, 140, 160, 170, 224, 238, 256, 272, 278, 280, 320, 340, 448, 476, 544, 556, 560, 595, 640, 680, 695, 896, 952, 973, 1088, 1112, 1120, 1190, 1280, 1360, 1390, 1792, 1904, 1946, 2176, 2224, 2240, 2363, 2380, 2720, 2780, 3808, 3892, 4352, 4448, 4480, 4726, 4760, 4865, 5440, 5560, 7616, 7784, 8896, 8960, 9452, 9520, 9730, 10880, 11120, 11815, 15232, 15568, 16541, 17792, 18904, 19040, 19460, 21760, 22240, 23630, 30464, 31136, 33082, 35584, 37808, 38080, 38920, 44480, 47260, 62272, 66164, 75616, 76160, 77840, 82705, 88960, 94520, 124544, 132328, 151232, 152320, 155680, 165410, 177920, 189040, 249088, 264656, 302464, 311360, 330820, 378080, 529312, 604928, 622720, 661640, 756160, 1058624, 1245440, 1323280, 1512320, 2117248, 2646560, 3024640, 4234496, 5293120, 10586240, 21172480]

約数ペア:

[(1, 21172480), (2, 10586240), (4, 5293120), (5, 4234496), (7, 3024640), (8, 2646560), (10, 2117248), (14, 1512320), (16, 1323280), (17, 1245440), (20, 1058624), (28, 756160), (32, 661640), (34, 622720), (35, 604928), (40, 529312), (56, 378080), (64, 330820), (68, 311360), (70, 302464), (80, 264656), (85, 249088), (112, 189040), (119, 177920), (128, 165410), (136, 155680), (139, 152320), (140, 151232), (160, 132328), (170, 124544), (224, 94520), (238, 88960), (256, 82705), (272, 77840), (278, 76160), (280, 75616), (320, 66164), (340, 62272), (448, 47260), (476, 44480), (544, 38920), (556, 38080), (560, 37808), (595, 35584), (640, 33082), (680, 31136), (695, 30464), (896, 23630), (952, 22240), (973, 21760), (1088, 19460), (1112, 19040), (1120, 18904), (1190, 17792), (1280, 16541), (1360, 15568), (1390, 15232), (1792, 11815), (1904, 11120), (1946, 10880), (2176, 9730), (2224, 9520), (2240, 9452), (2363, 8960), (2380, 8896), (2720, 7784), (2780, 7616), (3808, 5560), (3892, 5440), (4352, 4865), (4448, 4760), (4480, 4726)]