20458988

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{491}}^1\times {\mathrm{947}}^1$

素因数の和:1453

約数の個数: 24

約数和(自身を含む): 39178944

約数和(自身を除く): 18719956

約数列:

[1, 2, 4, 11, 22, 44, 491, 947, 982, 1894, 1964, 3788, 5401, 10417, 10802, 20834, 21604, 41668, 464977, 929954, 1859908, 5114747, 10229494, 20458988]

約数ペア:

[(1, 20458988), (2, 10229494), (4, 5114747), (11, 1859908), (22, 929954), (44, 464977), (491, 41668), (947, 21604), (982, 20834), (1894, 10802), (1964, 10417), (3788, 5401)]