28277900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:256

約数の個数: 108

約数和(自身を含む): 74214000

約数和(自身を除く): 45936100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 29, 35, 49, 50, 58, 70, 98, 100, 116, 140, 145, 175, 196, 199, 203, 245, 290, 350, 398, 406, 490, 580, 700, 725, 796, 812, 980, 995, 1015, 1225, 1393, 1421, 1450, 1990, 2030, 2450, 2786, 2842, 2900, 3980, 4060, 4900, 4975, 5075, 5572, 5684, 5771, 6965, 7105, 9751, 9950, 10150, 11542, 13930, 14210, 19502, 19900, 20300, 23084, 27860, 28420, 28855, 34825, 35525, 39004, 40397, 48755, 57710, 69650, 71050, 80794, 97510, 115420, 139300, 142100, 144275, 161588, 195020, 201985, 243775, 282779, 288550, 403970, 487550, 565558, 577100, 807940, 975100, 1009925, 1131116, 1413895, 2019850, 2827790, 4039700, 5655580, 7069475, 14138950, 28277900]

約数ペア:

[(1, 28277900), (2, 14138950), (4, 7069475), (5, 5655580), (7, 4039700), (10, 2827790), (14, 2019850), (20, 1413895), (25, 1131116), (28, 1009925), (29, 975100), (35, 807940), (49, 577100), (50, 565558), (58, 487550), (70, 403970), (98, 288550), (100, 282779), (116, 243775), (140, 201985), (145, 195020), (175, 161588), (196, 144275), (199, 142100), (203, 139300), (245, 115420), (290, 97510), (350, 80794), (398, 71050), (406, 69650), (490, 57710), (580, 48755), (700, 40397), (725, 39004), (796, 35525), (812, 34825), (980, 28855), (995, 28420), (1015, 27860), (1225, 23084), (1393, 20300), (1421, 19900), (1450, 19502), (1990, 14210), (2030, 13930), (2450, 11542), (2786, 10150), (2842, 9950), (2900, 9751), (3980, 7105), (4060, 6965), (4900, 5771), (4975, 5684), (5075, 5572)]