20018786975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{613}}^1\times {\mathrm{797}}^1$

素因数の和:1580

約数の個数: 48

約数和(自身を含む): 27340437600

約数和(自身を除く): 7321650625

約数列:

[1, 5, 11, 25, 55, 149, 275, 613, 745, 797, 1639, 3065, 3725, 3985, 6743, 8195, 8767, 15325, 19925, 33715, 40975, 43835, 91337, 118753, 168575, 219175, 456685, 488561, 593765, 1004707, 1306283, 2283425, 2442805, 2968825, 5023535, 5374171, 6531415, 12214025, 25117675, 26870855, 32657075, 72795589, 134354275, 363977945, 800751479, 1819889725, 4003757395, 20018786975]

約数ペア:

[(1, 20018786975), (5, 4003757395), (11, 1819889725), (25, 800751479), (55, 363977945), (149, 134354275), (275, 72795589), (613, 32657075), (745, 26870855), (797, 25117675), (1639, 12214025), (3065, 6531415), (3725, 5374171), (3985, 5023535), (6743, 2968825), (8195, 2442805), (8767, 2283425), (15325, 1306283), (19925, 1004707), (33715, 593765), (40975, 488561), (43835, 456685), (91337, 219175), (118753, 168575)]