21485552

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{167}}^1$

素因数の和:246

約数の個数: 80

約数和(自身を含む): 49496832

約数和(自身を除く): 28011280

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 34, 43, 44, 68, 86, 88, 136, 167, 172, 176, 187, 272, 334, 344, 374, 473, 668, 688, 731, 748, 946, 1336, 1462, 1496, 1837, 1892, 2672, 2839, 2924, 2992, 3674, 3784, 5678, 5848, 7181, 7348, 7568, 8041, 11356, 11696, 14362, 14696, 16082, 22712, 28724, 29392, 31229, 32164, 45424, 57448, 62458, 64328, 78991, 114896, 122077, 124916, 128656, 157982, 244154, 249832, 315964, 488308, 499664, 631928, 976616, 1263856, 1342847, 1953232, 2685694, 5371388, 10742776, 21485552]

約数ペア:

[(1, 21485552), (2, 10742776), (4, 5371388), (8, 2685694), (11, 1953232), (16, 1342847), (17, 1263856), (22, 976616), (34, 631928), (43, 499664), (44, 488308), (68, 315964), (86, 249832), (88, 244154), (136, 157982), (167, 128656), (172, 124916), (176, 122077), (187, 114896), (272, 78991), (334, 64328), (344, 62458), (374, 57448), (473, 45424), (668, 32164), (688, 31229), (731, 29392), (748, 28724), (946, 22712), (1336, 16082), (1462, 14696), (1496, 14362), (1837, 11696), (1892, 11356), (2672, 8041), (2839, 7568), (2924, 7348), (2992, 7181), (3674, 5848), (3784, 5678)]