19687500

素因数分解:

$2^2\times 3^2\times 5^7\times 7^1$

素因数の和:52

約数の個数: 144

約数和(自身を含む): 71093568

約数和(自身を除く): 51406068

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 25, 28, 30, 35, 36, 42, 45, 50, 60, 63, 70, 75, 84, 90, 100, 105, 125, 126, 140, 150, 175, 180, 210, 225, 250, 252, 300, 315, 350, 375, 420, 450, 500, 525, 625, 630, 700, 750, 875, 900, 1050, 1125, 1250, 1260, 1500, 1575, 1750, 1875, 2100, 2250, 2500, 2625, 3125, 3150, 3500, 3750, 4375, 4500, 5250, 5625, 6250, 6300, 7500, 7875, 8750, 9375, 10500, 11250, 12500, 13125, 15625, 15750, 17500, 18750, 21875, 22500, 26250, 28125, 31250, 31500, 37500, 39375, 43750, 46875, 52500, 56250, 62500, 65625, 78125, 78750, 87500, 93750, 109375, 112500, 131250, 140625, 156250, 157500, 187500, 196875, 218750, 234375, 262500, 281250, 312500, 328125, 393750, 437500, 468750, 546875, 562500, 656250, 703125, 787500, 937500, 984375, 1093750, 1312500, 1406250, 1640625, 1968750, 2187500, 2812500, 3281250, 3937500, 4921875, 6562500, 9843750, 19687500]

約数ペア:

[(1, 19687500), (2, 9843750), (3, 6562500), (4, 4921875), (5, 3937500), (6, 3281250), (7, 2812500), (9, 2187500), (10, 1968750), (12, 1640625), (14, 1406250), (15, 1312500), (18, 1093750), (20, 984375), (21, 937500), (25, 787500), (28, 703125), (30, 656250), (35, 562500), (36, 546875), (42, 468750), (45, 437500), (50, 393750), (60, 328125), (63, 312500), (70, 281250), (75, 262500), (84, 234375), (90, 218750), (100, 196875), (105, 187500), (125, 157500), (126, 156250), (140, 140625), (150, 131250), (175, 112500), (180, 109375), (210, 93750), (225, 87500), (250, 78750), (252, 78125), (300, 65625), (315, 62500), (350, 56250), (375, 52500), (420, 46875), (450, 43750), (500, 39375), (525, 37500), (625, 31500), (630, 31250), (700, 28125), (750, 26250), (875, 22500), (900, 21875), (1050, 18750), (1125, 17500), (1250, 15750), (1260, 15625), (1500, 13125), (1575, 12500), (1750, 11250), (1875, 10500), (2100, 9375), (2250, 8750), (2500, 7875), (2625, 7500), (3125, 6300), (3150, 6250), (3500, 5625), (3750, 5250), (4375, 4500)]