21390621

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{661}}^1$

素因数の和:761

約数の個数: 32

約数和(自身を含む): 34572288

約数和(自身を除く): 13181667

約数列:

[1, 3, 7, 21, 23, 67, 69, 161, 201, 469, 483, 661, 1407, 1541, 1983, 4623, 4627, 10787, 13881, 15203, 32361, 44287, 45609, 106421, 132861, 310009, 319263, 930027, 1018601, 3055803, 7130207, 21390621]

約数ペア:

[(1, 21390621), (3, 7130207), (7, 3055803), (21, 1018601), (23, 930027), (67, 319263), (69, 310009), (161, 132861), (201, 106421), (469, 45609), (483, 44287), (661, 32361), (1407, 15203), (1541, 13881), (1983, 10787), (4623, 4627)]