21211660

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{20011}}^1$

素因数の和:20073

約数の個数: 24

約数和(自身を含む): 45387216

約数和(自身を除く): 24175556

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 20011, 40022, 80044, 100055, 200110, 400220, 1060583, 2121166, 4242332, 5302915, 10605830, 21211660]

約数ペア:

[(1, 21211660), (2, 10605830), (4, 5302915), (5, 4242332), (10, 2121166), (20, 1060583), (53, 400220), (106, 200110), (212, 100055), (265, 80044), (530, 40022), (1060, 20011)]