21259216

素因数分解:

$2^4\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:248

約数の個数: 60

約数和(自身を含む): 46177600

約数和(自身を除く): 24918384

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 79, 88, 121, 139, 158, 176, 242, 278, 316, 484, 556, 632, 869, 968, 1112, 1264, 1529, 1738, 1936, 2224, 3058, 3476, 6116, 6952, 9559, 10981, 12232, 13904, 16819, 19118, 21962, 24464, 33638, 38236, 43924, 67276, 76472, 87848, 120791, 134552, 152944, 175696, 241582, 269104, 483164, 966328, 1328701, 1932656, 2657402, 5314804, 10629608, 21259216]

約数ペア:

[(1, 21259216), (2, 10629608), (4, 5314804), (8, 2657402), (11, 1932656), (16, 1328701), (22, 966328), (44, 483164), (79, 269104), (88, 241582), (121, 175696), (139, 152944), (158, 134552), (176, 120791), (242, 87848), (278, 76472), (316, 67276), (484, 43924), (556, 38236), (632, 33638), (869, 24464), (968, 21962), (1112, 19118), (1264, 16819), (1529, 13904), (1738, 12232), (1936, 10981), (2224, 9559), (3058, 6952), (3476, 6116)]