21501872

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{491}}^1$

素因数の和:546

約数の個数: 80

約数和(自身を含む): 52710912

約数和(自身を除く): 31209040

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 23, 28, 34, 46, 56, 68, 92, 112, 119, 136, 161, 184, 238, 272, 322, 368, 391, 476, 491, 644, 782, 952, 982, 1288, 1564, 1904, 1964, 2576, 2737, 3128, 3437, 3928, 5474, 6256, 6874, 7856, 8347, 10948, 11293, 13748, 16694, 21896, 22586, 27496, 33388, 43792, 45172, 54992, 58429, 66776, 79051, 90344, 116858, 133552, 158102, 180688, 191981, 233716, 316204, 383962, 467432, 632408, 767924, 934864, 1264816, 1343867, 1535848, 2687734, 3071696, 5375468, 10750936, 21501872]

約数ペア:

[(1, 21501872), (2, 10750936), (4, 5375468), (7, 3071696), (8, 2687734), (14, 1535848), (16, 1343867), (17, 1264816), (23, 934864), (28, 767924), (34, 632408), (46, 467432), (56, 383962), (68, 316204), (92, 233716), (112, 191981), (119, 180688), (136, 158102), (161, 133552), (184, 116858), (238, 90344), (272, 79051), (322, 66776), (368, 58429), (391, 54992), (476, 45172), (491, 43792), (644, 33388), (782, 27496), (952, 22586), (982, 21896), (1288, 16694), (1564, 13748), (1904, 11293), (1964, 10948), (2576, 8347), (2737, 7856), (3128, 6874), (3437, 6256), (3928, 5474)]