21007029212

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31075487}}^1$

素因数の和:31075517

約数の個数: 18

約数和(自身を含む): 39807700128

約数和(自身を除く): 18800670916

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31075487, 62150974, 124301948, 403981331, 807962662, 1615925324, 5251757303, 10503514606, 21007029212]

約数ペア:

[(1, 21007029212), (2, 10503514606), (4, 5251757303), (13, 1615925324), (26, 807962662), (52, 403981331), (169, 124301948), (338, 62150974), (676, 31075487)]