20721184

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{43}}^1$

素因数の和:138

約数の個数: 72

約数和(自身を含む): 46802448

約数和(自身を除く): 26081264

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 37, 43, 44, 74, 86, 88, 148, 172, 176, 296, 344, 352, 407, 473, 592, 688, 814, 946, 1184, 1369, 1376, 1591, 1628, 1892, 2738, 3182, 3256, 3784, 5476, 6364, 6512, 7568, 10952, 12728, 13024, 15059, 15136, 17501, 21904, 25456, 30118, 35002, 43808, 50912, 58867, 60236, 70004, 117734, 120472, 140008, 235468, 240944, 280016, 470936, 481888, 560032, 647537, 941872, 1295074, 1883744, 2590148, 5180296, 10360592, 20721184]

約数ペア:

[(1, 20721184), (2, 10360592), (4, 5180296), (8, 2590148), (11, 1883744), (16, 1295074), (22, 941872), (32, 647537), (37, 560032), (43, 481888), (44, 470936), (74, 280016), (86, 240944), (88, 235468), (148, 140008), (172, 120472), (176, 117734), (296, 70004), (344, 60236), (352, 58867), (407, 50912), (473, 43808), (592, 35002), (688, 30118), (814, 25456), (946, 21904), (1184, 17501), (1369, 15136), (1376, 15059), (1591, 13024), (1628, 12728), (1892, 10952), (2738, 7568), (3182, 6512), (3256, 6364), (3784, 5476)]