21281208

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{68209}}^1$

素因数の和:68231

約数の個数: 32

約数和(自身を含む): 57296400

約数和(自身を除く): 36015192

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 156, 312, 68209, 136418, 204627, 272836, 409254, 545672, 818508, 886717, 1637016, 1773434, 2660151, 3546868, 5320302, 7093736, 10640604, 21281208]

約数ペア:

[(1, 21281208), (2, 10640604), (3, 7093736), (4, 5320302), (6, 3546868), (8, 2660151), (12, 1773434), (13, 1637016), (24, 886717), (26, 818508), (39, 545672), (52, 409254), (78, 272836), (104, 204627), (156, 136418), (312, 68209)]