20281085

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:341

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 8230915

約数列:

[1, 5, 11, 17, 55, 85, 109, 187, 199, 545, 935, 995, 1199, 1853, 2189, 3383, 5995, 9265, 10945, 16915, 20383, 21691, 37213, 101915, 108455, 186065, 238601, 368747, 1193005, 1843735, 4056217, 20281085]

約数ペア:

[(1, 20281085), (5, 4056217), (11, 1843735), (17, 1193005), (55, 368747), (85, 238601), (109, 186065), (187, 108455), (199, 101915), (545, 37213), (935, 21691), (995, 20383), (1199, 16915), (1853, 10945), (2189, 9265), (3383, 5995)]