20811440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20011}}^1$

素因数の和:20037

約数の個数: 40

約数和(自身を含む): 52111248

約数和(自身を除く): 31299808

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20011, 40022, 80044, 100055, 160088, 200110, 260143, 320176, 400220, 520286, 800440, 1040572, 1300715, 1600880, 2081144, 2601430, 4162288, 5202860, 10405720, 20811440]

約数ペア:

[(1, 20811440), (2, 10405720), (4, 5202860), (5, 4162288), (8, 2601430), (10, 2081144), (13, 1600880), (16, 1300715), (20, 1040572), (26, 800440), (40, 520286), (52, 400220), (65, 320176), (80, 260143), (104, 200110), (130, 160088), (208, 100055), (260, 80044), (520, 40022), (1040, 20011)]