20408500

素因数分解:

$2^2\times 5^3\times 7^4\times {\mathrm{17}}^1$

素因数の和:64

約数の個数: 120

約数和(自身を含む): 55056456

約数和(自身を除く): 34647956

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 25, 28, 34, 35, 49, 50, 68, 70, 85, 98, 100, 119, 125, 140, 170, 175, 196, 238, 245, 250, 340, 343, 350, 425, 476, 490, 500, 595, 686, 700, 833, 850, 875, 980, 1190, 1225, 1372, 1666, 1700, 1715, 1750, 2125, 2380, 2401, 2450, 2975, 3332, 3430, 3500, 4165, 4250, 4802, 4900, 5831, 5950, 6125, 6860, 8330, 8500, 8575, 9604, 11662, 11900, 12005, 12250, 14875, 16660, 17150, 20825, 23324, 24010, 24500, 29155, 29750, 34300, 40817, 41650, 42875, 48020, 58310, 59500, 60025, 81634, 83300, 85750, 104125, 116620, 120050, 145775, 163268, 171500, 204085, 208250, 240100, 291550, 300125, 408170, 416500, 583100, 600250, 728875, 816340, 1020425, 1200500, 1457750, 2040850, 2915500, 4081700, 5102125, 10204250, 20408500]

約数ペア:

[(1, 20408500), (2, 10204250), (4, 5102125), (5, 4081700), (7, 2915500), (10, 2040850), (14, 1457750), (17, 1200500), (20, 1020425), (25, 816340), (28, 728875), (34, 600250), (35, 583100), (49, 416500), (50, 408170), (68, 300125), (70, 291550), (85, 240100), (98, 208250), (100, 204085), (119, 171500), (125, 163268), (140, 145775), (170, 120050), (175, 116620), (196, 104125), (238, 85750), (245, 83300), (250, 81634), (340, 60025), (343, 59500), (350, 58310), (425, 48020), (476, 42875), (490, 41650), (500, 40817), (595, 34300), (686, 29750), (700, 29155), (833, 24500), (850, 24010), (875, 23324), (980, 20825), (1190, 17150), (1225, 16660), (1372, 14875), (1666, 12250), (1700, 12005), (1715, 11900), (1750, 11662), (2125, 9604), (2380, 8575), (2401, 8500), (2450, 8330), (2975, 6860), (3332, 6125), (3430, 5950), (3500, 5831), (4165, 4900), (4250, 4802)]