21398216

素因数分解:

$2^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2749}}^1$

素因数の和:2901

約数の個数: 32

約数和(自身を含む): 46200000

約数和(自身を除く): 24801784

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 139, 278, 556, 973, 1112, 1946, 2749, 3892, 5498, 7784, 10996, 19243, 21992, 38486, 76972, 153944, 382111, 764222, 1528444, 2674777, 3056888, 5349554, 10699108, 21398216]

約数ペア:

[(1, 21398216), (2, 10699108), (4, 5349554), (7, 3056888), (8, 2674777), (14, 1528444), (28, 764222), (56, 382111), (139, 153944), (278, 76972), (556, 38486), (973, 21992), (1112, 19243), (1946, 10996), (2749, 7784), (3892, 5498)]