21378756

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1831}}^1$

素因数の和:1984

約数の個数: 48

約数和(自身を含む): 57451520

約数和(自身を除く): 36072764

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 139, 278, 417, 556, 834, 973, 1668, 1831, 1946, 2919, 3662, 3892, 5493, 5838, 7324, 10986, 11676, 12817, 21972, 25634, 38451, 51268, 76902, 153804, 254509, 509018, 763527, 1018036, 1527054, 1781563, 3054108, 3563126, 5344689, 7126252, 10689378, 21378756]

約数ペア:

[(1, 21378756), (2, 10689378), (3, 7126252), (4, 5344689), (6, 3563126), (7, 3054108), (12, 1781563), (14, 1527054), (21, 1018036), (28, 763527), (42, 509018), (84, 254509), (139, 153804), (278, 76902), (417, 51268), (556, 38451), (834, 25634), (973, 21972), (1668, 12817), (1831, 11676), (1946, 10986), (2919, 7324), (3662, 5838), (3892, 5493)]