21385994

素因数分解:

$2^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{2311}}^1$

素因数の和:2981

約数の個数: 16

約数和(自身を含む): 36733056

約数和(自身を除く): 15347062

約数列:

[1, 2, 7, 14, 661, 1322, 2311, 4622, 4627, 9254, 16177, 32354, 1527571, 3055142, 10692997, 21385994]

約数ペア:

[(1, 21385994), (2, 10692997), (7, 3055142), (14, 1527571), (661, 32354), (1322, 16177), (2311, 9254), (4622, 4627)]