20901904

素因数分解:

$2^4\times {\mathrm{281}}^1\times {\mathrm{4649}}^1$

素因数の和:4938

約数の個数: 20

約数和(自身を含む): 40650300

約数和(自身を除く): 19748396

約数列:

[1, 2, 4, 8, 16, 281, 562, 1124, 2248, 4496, 4649, 9298, 18596, 37192, 74384, 1306369, 2612738, 5225476, 10450952, 20901904]

約数ペア:

[(1, 20901904), (2, 10450952), (4, 5225476), (8, 2612738), (16, 1306369), (281, 74384), (562, 37192), (1124, 18596), (2248, 9298), (4496, 4649)]