20982005

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{439}}^1$

素因数の和:545

約数の個数: 24

約数和(自身を含む): 28089600

約数和(自身を除く): 7107595

約数列:

[1, 5, 11, 55, 79, 121, 395, 439, 605, 869, 2195, 4345, 4829, 9559, 24145, 34681, 47795, 53119, 173405, 265595, 381491, 1907455, 4196401, 20982005]

約数ペア:

[(1, 20982005), (5, 4196401), (11, 1907455), (55, 381491), (79, 265595), (121, 173405), (395, 53119), (439, 47795), (605, 34681), (869, 24145), (2195, 9559), (4345, 4829)]