21467560

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7559}}^1$

素因数の和:7641

約数の個数: 32

約数和(自身を含む): 48988800

約数和(自身を除く): 27521240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7559, 15118, 30236, 37795, 60472, 75590, 151180, 302360, 536689, 1073378, 2146756, 2683445, 4293512, 5366890, 10733780, 21467560]

約数ペア:

[(1, 21467560), (2, 10733780), (4, 5366890), (5, 4293512), (8, 2683445), (10, 2146756), (20, 1073378), (40, 536689), (71, 302360), (142, 151180), (284, 75590), (355, 60472), (568, 37795), (710, 30236), (1420, 15118), (2840, 7559)]