21042056

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2$

素因数の和:115

約数の個数: 96

約数和(自身を含む): 51477120

約数和(自身を除く): 30435064

約数列:

[1, 2, 4, 7, 8, 14, 17, 23, 28, 31, 34, 46, 56, 62, 68, 92, 119, 124, 136, 161, 184, 217, 238, 248, 322, 391, 434, 476, 527, 644, 713, 782, 868, 952, 961, 1054, 1288, 1426, 1564, 1736, 1922, 2108, 2737, 2852, 3128, 3689, 3844, 4216, 4991, 5474, 5704, 6727, 7378, 7688, 9982, 10948, 12121, 13454, 14756, 16337, 19964, 21896, 22103, 24242, 26908, 29512, 32674, 39928, 44206, 48484, 53816, 65348, 84847, 88412, 96968, 114359, 130696, 154721, 169694, 176824, 228718, 309442, 339388, 375751, 457436, 618884, 678776, 751502, 914872, 1237768, 1503004, 2630257, 3006008, 5260514, 10521028, 21042056]

約数ペア:

[(1, 21042056), (2, 10521028), (4, 5260514), (7, 3006008), (8, 2630257), (14, 1503004), (17, 1237768), (23, 914872), (28, 751502), (31, 678776), (34, 618884), (46, 457436), (56, 375751), (62, 339388), (68, 309442), (92, 228718), (119, 176824), (124, 169694), (136, 154721), (161, 130696), (184, 114359), (217, 96968), (238, 88412), (248, 84847), (322, 65348), (391, 53816), (434, 48484), (476, 44206), (527, 39928), (644, 32674), (713, 29512), (782, 26908), (868, 24242), (952, 22103), (961, 21896), (1054, 19964), (1288, 16337), (1426, 14756), (1564, 13454), (1736, 12121), (1922, 10948), (2108, 9982), (2737, 7688), (2852, 7378), (3128, 6727), (3689, 5704), (3844, 5474), (4216, 4991)]