21875000

素因数分解:

$2^3\times 5^8\times 7^1$

素因数の和:53

約数の個数: 72

約数和(自身を含む): 58593720

約数和(自身を除く): 36718720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 250, 280, 350, 500, 625, 700, 875, 1000, 1250, 1400, 1750, 2500, 3125, 3500, 4375, 5000, 6250, 7000, 8750, 12500, 15625, 17500, 21875, 25000, 31250, 35000, 43750, 62500, 78125, 87500, 109375, 125000, 156250, 175000, 218750, 312500, 390625, 437500, 546875, 625000, 781250, 875000, 1093750, 1562500, 2187500, 2734375, 3125000, 4375000, 5468750, 10937500, 21875000]

約数ペア:

[(1, 21875000), (2, 10937500), (4, 5468750), (5, 4375000), (7, 3125000), (8, 2734375), (10, 2187500), (14, 1562500), (20, 1093750), (25, 875000), (28, 781250), (35, 625000), (40, 546875), (50, 437500), (56, 390625), (70, 312500), (100, 218750), (125, 175000), (140, 156250), (175, 125000), (200, 109375), (250, 87500), (280, 78125), (350, 62500), (500, 43750), (625, 35000), (700, 31250), (875, 25000), (1000, 21875), (1250, 17500), (1400, 15625), (1750, 12500), (2500, 8750), (3125, 7000), (3500, 6250), (4375, 5000)]