21704984

素因数分解:

$2^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 48522240

約数和(自身を除く): 26817256

約数列:

[1, 2, 4, 7, 8, 14, 28, 53, 56, 71, 103, 106, 142, 206, 212, 284, 371, 412, 424, 497, 568, 721, 742, 824, 994, 1442, 1484, 1988, 2884, 2968, 3763, 3976, 5459, 5768, 7313, 7526, 10918, 14626, 15052, 21836, 26341, 29252, 30104, 38213, 43672, 51191, 52682, 58504, 76426, 102382, 105364, 152852, 204764, 210728, 305704, 387589, 409528, 775178, 1550356, 2713123, 3100712, 5426246, 10852492, 21704984]

約数ペア:

[(1, 21704984), (2, 10852492), (4, 5426246), (7, 3100712), (8, 2713123), (14, 1550356), (28, 775178), (53, 409528), (56, 387589), (71, 305704), (103, 210728), (106, 204764), (142, 152852), (206, 105364), (212, 102382), (284, 76426), (371, 58504), (412, 52682), (424, 51191), (497, 43672), (568, 38213), (721, 30104), (742, 29252), (824, 26341), (994, 21836), (1442, 15052), (1484, 14626), (1988, 10918), (2884, 7526), (2968, 7313), (3763, 5768), (3976, 5459)]