21120579

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 34354944

約数和(自身を除く): 13234365

約数列:

[1, 3, 9, 17, 31, 51, 61, 73, 93, 153, 183, 219, 279, 527, 549, 657, 1037, 1241, 1581, 1891, 2263, 3111, 3723, 4453, 4743, 5673, 6789, 9333, 11169, 13359, 17019, 20367, 32147, 38471, 40077, 75701, 96441, 115413, 138043, 227103, 289323, 346239, 414129, 681309, 1242387, 2346731, 7040193, 21120579]

約数ペア:

[(1, 21120579), (3, 7040193), (9, 2346731), (17, 1242387), (31, 681309), (51, 414129), (61, 346239), (73, 289323), (93, 227103), (153, 138043), (183, 115413), (219, 96441), (279, 75701), (527, 40077), (549, 38471), (657, 32147), (1037, 20367), (1241, 17019), (1581, 13359), (1891, 11169), (2263, 9333), (3111, 6789), (3723, 5673), (4453, 4743)]