21379778

素因数分解:

$2^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{313}}^1$

素因数の和:387

約数の個数: 48

約数和(自身を含む): 40592664

約数和(自身を除く): 19212886

約数列:

[1, 2, 7, 14, 17, 34, 41, 49, 82, 98, 119, 238, 287, 313, 574, 626, 697, 833, 1394, 1666, 2009, 2191, 4018, 4382, 4879, 5321, 9758, 10642, 12833, 15337, 25666, 30674, 34153, 37247, 68306, 74494, 89831, 179662, 218161, 260729, 436322, 521458, 628817, 1257634, 1527127, 3054254, 10689889, 21379778]

約数ペア:

[(1, 21379778), (2, 10689889), (7, 3054254), (14, 1527127), (17, 1257634), (34, 628817), (41, 521458), (49, 436322), (82, 260729), (98, 218161), (119, 179662), (238, 89831), (287, 74494), (313, 68306), (574, 37247), (626, 34153), (697, 30674), (833, 25666), (1394, 15337), (1666, 12833), (2009, 10642), (2191, 9758), (4018, 5321), (4382, 4879)]