20816120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40031}}^1$

素因数の和:40055

約数の個数: 32

約数和(自身を含む): 50440320

約数和(自身を除く): 29624200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40031, 80062, 160124, 200155, 320248, 400310, 520403, 800620, 1040806, 1601240, 2081612, 2602015, 4163224, 5204030, 10408060, 20816120]

約数ペア:

[(1, 20816120), (2, 10408060), (4, 5204030), (5, 4163224), (8, 2602015), (10, 2081612), (13, 1601240), (20, 1040806), (26, 800620), (40, 520403), (52, 400310), (65, 320248), (104, 200155), (130, 160124), (260, 80062), (520, 40031)]