19800275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{809}}^1$

素因数の和:919

約数の個数: 24

約数和(自身を含む): 27118800

約数和(自身を除く): 7318525

約数列:

[1, 5, 11, 25, 55, 89, 275, 445, 809, 979, 2225, 4045, 4895, 8899, 20225, 24475, 44495, 72001, 222475, 360005, 792011, 1800025, 3960055, 19800275]

約数ペア:

[(1, 19800275), (5, 3960055), (11, 1800025), (25, 792011), (55, 360005), (89, 222475), (275, 72001), (445, 44495), (809, 24475), (979, 20225), (2225, 8899), (4045, 4895)]