20289995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{12721}}^1$

素因数の和:12766

約数の個数: 16

約数和(自身を含む): 27479520

約数和(自身を除く): 7189525

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 12721, 63605, 139931, 368909, 699655, 1844545, 4057999, 20289995]

約数ペア:

[(1, 20289995), (5, 4057999), (11, 1844545), (29, 699655), (55, 368909), (145, 139931), (319, 63605), (1595, 12721)]