21138908

素因数分解:

$2^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{16063}}^1$

素因数の和:16121

約数の個数: 24

約数和(自身を含む): 43180032

約数和(自身を除く): 22041124

約数列:

[1, 2, 4, 7, 14, 28, 47, 94, 188, 329, 658, 1316, 16063, 32126, 64252, 112441, 224882, 449764, 754961, 1509922, 3019844, 5284727, 10569454, 21138908]

約数ペア:

[(1, 21138908), (2, 10569454), (4, 5284727), (7, 3019844), (14, 1509922), (28, 754961), (47, 449764), (94, 224882), (188, 112441), (329, 64252), (658, 32126), (1316, 16063)]