21815696

素因数分解:

$2^4\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1787}}^1$

素因数の和:1911

約数の個数: 40

約数和(自身を含む): 48776640

約数和(自身を除く): 26960944

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 109, 112, 218, 436, 763, 872, 1526, 1744, 1787, 3052, 3574, 6104, 7148, 12208, 12509, 14296, 25018, 28592, 50036, 100072, 194783, 200144, 389566, 779132, 1363481, 1558264, 2726962, 3116528, 5453924, 10907848, 21815696]

約数ペア:

[(1, 21815696), (2, 10907848), (4, 5453924), (7, 3116528), (8, 2726962), (14, 1558264), (16, 1363481), (28, 779132), (56, 389566), (109, 200144), (112, 194783), (218, 100072), (436, 50036), (763, 28592), (872, 25018), (1526, 14296), (1744, 12509), (1787, 12208), (3052, 7148), (3574, 6104)]