21871180

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64327}}^1$

素因数の和:64353

約数の個数: 24

約数和(自身を含む): 48631968

約数和(自身を除く): 26760788

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64327, 128654, 257308, 321635, 643270, 1093559, 1286540, 2187118, 4374236, 5467795, 10935590, 21871180]

約数ペア:

[(1, 21871180), (2, 10935590), (4, 5467795), (5, 4374236), (10, 2187118), (17, 1286540), (20, 1093559), (34, 643270), (68, 321635), (85, 257308), (170, 128654), (340, 64327)]