19971185

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 27605760

約数和(自身を除く): 7634575

約数列:

[1, 5, 13, 19, 65, 95, 103, 157, 247, 515, 785, 1235, 1339, 1957, 2041, 2983, 6695, 9785, 10205, 14915, 16171, 25441, 38779, 80855, 127205, 193895, 210223, 307249, 1051115, 1536245, 3994237, 19971185]

約数ペア:

[(1, 19971185), (5, 3994237), (13, 1536245), (19, 1051115), (65, 307249), (95, 210223), (103, 193895), (157, 127205), (247, 80855), (515, 38779), (785, 25441), (1235, 16171), (1339, 14915), (1957, 10205), (2041, 9785), (2983, 6695)]