20198828

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{1249}}^1$

素因数の和:1577

約数の個数: 24

約数和(自身を含む): 38220000

約数和(自身を除く): 18021172

約数列:

[1, 2, 4, 13, 26, 52, 311, 622, 1244, 1249, 2498, 4043, 4996, 8086, 16172, 16237, 32474, 64948, 388439, 776878, 1553756, 5049707, 10099414, 20198828]

約数ペア:

[(1, 20198828), (2, 10099414), (4, 5049707), (13, 1553756), (26, 776878), (52, 388439), (311, 64948), (622, 32474), (1244, 16237), (1249, 16172), (2498, 8086), (4043, 4996)]