20457940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14407}}^1$

素因数の和:14487

約数の個数: 24

約数和(自身を含む): 43569792

約数和(自身を除く): 23111852

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14407, 28814, 57628, 72035, 144070, 288140, 1022897, 2045794, 4091588, 5114485, 10228970, 20457940]

約数ペア:

[(1, 20457940), (2, 10228970), (4, 5114485), (5, 4091588), (10, 2045794), (20, 1022897), (71, 288140), (142, 144070), (284, 72035), (355, 57628), (710, 28814), (1420, 14407)]