20300000

素因数分解:

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

素因数の和:71

約数の個数: 144

約数和(自身を含む): 59058720

約数和(自身を除く): 38758720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 29, 32, 35, 40, 50, 56, 58, 70, 80, 100, 112, 116, 125, 140, 145, 160, 175, 200, 203, 224, 232, 250, 280, 290, 350, 400, 406, 464, 500, 560, 580, 625, 700, 725, 800, 812, 875, 928, 1000, 1015, 1120, 1160, 1250, 1400, 1450, 1624, 1750, 2000, 2030, 2320, 2500, 2800, 2900, 3125, 3248, 3500, 3625, 4000, 4060, 4375, 4640, 5000, 5075, 5600, 5800, 6250, 6496, 7000, 7250, 8120, 8750, 10000, 10150, 11600, 12500, 14000, 14500, 16240, 17500, 18125, 20000, 20300, 21875, 23200, 25000, 25375, 28000, 29000, 32480, 35000, 36250, 40600, 43750, 50000, 50750, 58000, 70000, 72500, 81200, 87500, 90625, 100000, 101500, 116000, 126875, 140000, 145000, 162400, 175000, 181250, 203000, 253750, 290000, 350000, 362500, 406000, 507500, 580000, 634375, 700000, 725000, 812000, 1015000, 1268750, 1450000, 2030000, 2537500, 2900000, 4060000, 5075000, 10150000, 20300000]

約数ペア:

[(1, 20300000), (2, 10150000), (4, 5075000), (5, 4060000), (7, 2900000), (8, 2537500), (10, 2030000), (14, 1450000), (16, 1268750), (20, 1015000), (25, 812000), (28, 725000), (29, 700000), (32, 634375), (35, 580000), (40, 507500), (50, 406000), (56, 362500), (58, 350000), (70, 290000), (80, 253750), (100, 203000), (112, 181250), (116, 175000), (125, 162400), (140, 145000), (145, 140000), (160, 126875), (175, 116000), (200, 101500), (203, 100000), (224, 90625), (232, 87500), (250, 81200), (280, 72500), (290, 70000), (350, 58000), (400, 50750), (406, 50000), (464, 43750), (500, 40600), (560, 36250), (580, 35000), (625, 32480), (700, 29000), (725, 28000), (800, 25375), (812, 25000), (875, 23200), (928, 21875), (1000, 20300), (1015, 20000), (1120, 18125), (1160, 17500), (1250, 16240), (1400, 14500), (1450, 14000), (1624, 12500), (1750, 11600), (2000, 10150), (2030, 10000), (2320, 8750), (2500, 8120), (2800, 7250), (2900, 7000), (3125, 6496), (3248, 6250), (3500, 5800), (3625, 5600), (4000, 5075), (4060, 5000), (4375, 4640)]