21213276

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{839}}^1$

素因数の和:903

約数の個数: 72

約数和(自身を含む): 58988160

約数和(自身を除く): 37774884

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 43, 49, 84, 86, 98, 129, 147, 172, 196, 258, 294, 301, 516, 588, 602, 839, 903, 1204, 1678, 1806, 2107, 2517, 3356, 3612, 4214, 5034, 5873, 6321, 8428, 10068, 11746, 12642, 17619, 23492, 25284, 35238, 36077, 41111, 70476, 72154, 82222, 108231, 123333, 144308, 164444, 216462, 246666, 252539, 432924, 493332, 505078, 757617, 1010156, 1515234, 1767773, 3030468, 3535546, 5303319, 7071092, 10606638, 21213276]

約数ペア:

[(1, 21213276), (2, 10606638), (3, 7071092), (4, 5303319), (6, 3535546), (7, 3030468), (12, 1767773), (14, 1515234), (21, 1010156), (28, 757617), (42, 505078), (43, 493332), (49, 432924), (84, 252539), (86, 246666), (98, 216462), (129, 164444), (147, 144308), (172, 123333), (196, 108231), (258, 82222), (294, 72154), (301, 70476), (516, 41111), (588, 36077), (602, 35238), (839, 25284), (903, 23492), (1204, 17619), (1678, 12642), (1806, 11746), (2107, 10068), (2517, 8428), (3356, 6321), (3612, 5873), (4214, 5034)]