21700000

素因数分解:

$2^5\times 5^5\times 7^1\times {\mathrm{31}}^1$

素因数の和:73

約数の個数: 144

約数和(自身を含む): 62995968

約数和(自身を除く): 41295968

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 31, 32, 35, 40, 50, 56, 62, 70, 80, 100, 112, 124, 125, 140, 155, 160, 175, 200, 217, 224, 248, 250, 280, 310, 350, 400, 434, 496, 500, 560, 620, 625, 700, 775, 800, 868, 875, 992, 1000, 1085, 1120, 1240, 1250, 1400, 1550, 1736, 1750, 2000, 2170, 2480, 2500, 2800, 3100, 3125, 3472, 3500, 3875, 4000, 4340, 4375, 4960, 5000, 5425, 5600, 6200, 6250, 6944, 7000, 7750, 8680, 8750, 10000, 10850, 12400, 12500, 14000, 15500, 17360, 17500, 19375, 20000, 21700, 21875, 24800, 25000, 27125, 28000, 31000, 34720, 35000, 38750, 43400, 43750, 50000, 54250, 62000, 70000, 77500, 86800, 87500, 96875, 100000, 108500, 124000, 135625, 140000, 155000, 173600, 175000, 193750, 217000, 271250, 310000, 350000, 387500, 434000, 542500, 620000, 678125, 700000, 775000, 868000, 1085000, 1356250, 1550000, 2170000, 2712500, 3100000, 4340000, 5425000, 10850000, 21700000]

約数ペア:

[(1, 21700000), (2, 10850000), (4, 5425000), (5, 4340000), (7, 3100000), (8, 2712500), (10, 2170000), (14, 1550000), (16, 1356250), (20, 1085000), (25, 868000), (28, 775000), (31, 700000), (32, 678125), (35, 620000), (40, 542500), (50, 434000), (56, 387500), (62, 350000), (70, 310000), (80, 271250), (100, 217000), (112, 193750), (124, 175000), (125, 173600), (140, 155000), (155, 140000), (160, 135625), (175, 124000), (200, 108500), (217, 100000), (224, 96875), (248, 87500), (250, 86800), (280, 77500), (310, 70000), (350, 62000), (400, 54250), (434, 50000), (496, 43750), (500, 43400), (560, 38750), (620, 35000), (625, 34720), (700, 31000), (775, 28000), (800, 27125), (868, 25000), (875, 24800), (992, 21875), (1000, 21700), (1085, 20000), (1120, 19375), (1240, 17500), (1250, 17360), (1400, 15500), (1550, 14000), (1736, 12500), (1750, 12400), (2000, 10850), (2170, 10000), (2480, 8750), (2500, 8680), (2800, 7750), (3100, 7000), (3125, 6944), (3472, 6250), (3500, 6200), (3875, 5600), (4000, 5425), (4340, 5000), (4375, 4960)]