721574775

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2657}}^1$

素因数の和:2761

約数の個数: 72

約数和(自身を含む): 1388241504

約数和(自身を除く): 666666729

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 71, 75, 85, 153, 213, 225, 255, 355, 425, 639, 765, 1065, 1207, 1275, 1775, 2657, 3195, 3621, 3825, 5325, 6035, 7971, 10863, 13285, 15975, 18105, 23913, 30175, 39855, 45169, 54315, 66425, 90525, 119565, 135507, 188647, 199275, 225845, 271575, 406521, 565941, 597825, 677535, 943235, 1129225, 1697823, 2032605, 2829705, 3206999, 3387675, 4716175, 8489115, 9620997, 10163025, 14148525, 16034995, 28862991, 42445575, 48104985, 80174975, 144314955, 240524925, 721574775]

約数ペア:

[(1, 721574775), (3, 240524925), (5, 144314955), (9, 80174975), (15, 48104985), (17, 42445575), (25, 28862991), (45, 16034995), (51, 14148525), (71, 10163025), (75, 9620997), (85, 8489115), (153, 4716175), (213, 3387675), (225, 3206999), (255, 2829705), (355, 2032605), (425, 1697823), (639, 1129225), (765, 943235), (1065, 677535), (1207, 597825), (1275, 565941), (1775, 406521), (2657, 271575), (3195, 225845), (3621, 199275), (3825, 188647), (5325, 135507), (6035, 119565), (7971, 90525), (10863, 66425), (13285, 54315), (15975, 45169), (18105, 39855), (23913, 30175)]