20919665

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{1303}}^1$

素因数の和:1353

約数の個数: 24

約数和(自身を含む): 28635840

約数和(自身を除く): 7716175

約数列:

[1, 5, 13, 19, 65, 95, 169, 247, 845, 1235, 1303, 3211, 6515, 16055, 16939, 24757, 84695, 123785, 220207, 321841, 1101035, 1609205, 4183933, 20919665]

約数ペア:

[(1, 20919665), (5, 4183933), (13, 1609205), (19, 1101035), (65, 321841), (95, 220207), (169, 123785), (247, 84695), (845, 24757), (1235, 16939), (1303, 16055), (3211, 6515)]