19895480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{439}}^1$

素因数の和:564

約数の個数: 64

約数和(自身を含む): 49420800

約数和(自身を除く): 29525320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 103, 110, 206, 220, 412, 439, 440, 515, 824, 878, 1030, 1133, 1756, 2060, 2195, 2266, 3512, 4120, 4390, 4532, 4829, 5665, 8780, 9064, 9658, 11330, 17560, 19316, 22660, 24145, 38632, 45217, 45320, 48290, 90434, 96580, 180868, 193160, 226085, 361736, 452170, 497387, 904340, 994774, 1808680, 1989548, 2486935, 3979096, 4973870, 9947740, 19895480]

約数ペア:

[(1, 19895480), (2, 9947740), (4, 4973870), (5, 3979096), (8, 2486935), (10, 1989548), (11, 1808680), (20, 994774), (22, 904340), (40, 497387), (44, 452170), (55, 361736), (88, 226085), (103, 193160), (110, 180868), (206, 96580), (220, 90434), (412, 48290), (439, 45320), (440, 45217), (515, 38632), (824, 24145), (878, 22660), (1030, 19316), (1133, 17560), (1756, 11330), (2060, 9658), (2195, 9064), (2266, 8780), (3512, 5665), (4120, 4829), (4390, 4532)]