20157995

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{13}}^1\times {\mathrm{233}}^1$

素因数の和:284

約数の個数: 32

約数和(自身を含む): 28776384

約数和(自身を除く): 8618389

約数列:

[1, 5, 11, 13, 55, 65, 121, 143, 233, 605, 715, 1165, 1331, 1573, 2563, 3029, 6655, 7865, 12815, 15145, 17303, 28193, 33319, 86515, 140965, 166595, 310123, 366509, 1550615, 1832545, 4031599, 20157995]

約数ペア:

[(1, 20157995), (5, 4031599), (11, 1832545), (13, 1550615), (55, 366509), (65, 310123), (121, 166595), (143, 140965), (233, 86515), (605, 33319), (715, 28193), (1165, 17303), (1331, 15145), (1573, 12815), (2563, 7865), (3029, 6655)]