21153508

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{4643}}^1$

素因数の和:4731

約数の個数: 24

約数和(自身を含む): 39789792

約数和(自身を除く): 18636284

約数列:

[1, 2, 4, 17, 34, 67, 68, 134, 268, 1139, 2278, 4556, 4643, 9286, 18572, 78931, 157862, 311081, 315724, 622162, 1244324, 5288377, 10576754, 21153508]

約数ペア:

[(1, 21153508), (2, 10576754), (4, 5288377), (17, 1244324), (34, 622162), (67, 315724), (68, 311081), (134, 157862), (268, 78931), (1139, 18572), (2278, 9286), (4556, 4643)]