19864750000

素因数分解:

$2^4\times 5^6\times {\mathrm{181}}^1\times {\mathrm{439}}^1$

素因数の和:658

約数の個数: 140

約数和(自身を含む): 48485316880

約数和(自身を除く): 28620566880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 181, 200, 250, 362, 400, 439, 500, 625, 724, 878, 905, 1000, 1250, 1448, 1756, 1810, 2000, 2195, 2500, 2896, 3125, 3512, 3620, 4390, 4525, 5000, 6250, 7024, 7240, 8780, 9050, 10000, 10975, 12500, 14480, 15625, 17560, 18100, 21950, 22625, 25000, 31250, 35120, 36200, 43900, 45250, 50000, 54875, 62500, 72400, 79459, 87800, 90500, 109750, 113125, 125000, 158918, 175600, 181000, 219500, 226250, 250000, 274375, 317836, 362000, 397295, 439000, 452500, 548750, 565625, 635672, 794590, 878000, 905000, 1097500, 1131250, 1271344, 1371875, 1589180, 1810000, 1986475, 2195000, 2262500, 2743750, 2828125, 3178360, 3972950, 4390000, 4525000, 5487500, 5656250, 6356720, 6859375, 7945900, 9050000, 9932375, 10975000, 11312500, 13718750, 15891800, 19864750, 21950000, 22625000, 27437500, 31783600, 39729500, 45250000, 49661875, 54875000, 79459000, 99323750, 109750000, 158918000, 198647500, 248309375, 397295000, 496618750, 794590000, 993237500, 1241546875, 1986475000, 2483093750, 3972950000, 4966187500, 9932375000, 19864750000]

約数ペア:

[(1, 19864750000), (2, 9932375000), (4, 4966187500), (5, 3972950000), (8, 2483093750), (10, 1986475000), (16, 1241546875), (20, 993237500), (25, 794590000), (40, 496618750), (50, 397295000), (80, 248309375), (100, 198647500), (125, 158918000), (181, 109750000), (200, 99323750), (250, 79459000), (362, 54875000), (400, 49661875), (439, 45250000), (500, 39729500), (625, 31783600), (724, 27437500), (878, 22625000), (905, 21950000), (1000, 19864750), (1250, 15891800), (1448, 13718750), (1756, 11312500), (1810, 10975000), (2000, 9932375), (2195, 9050000), (2500, 7945900), (2896, 6859375), (3125, 6356720), (3512, 5656250), (3620, 5487500), (4390, 4525000), (4525, 4390000), (5000, 3972950), (6250, 3178360), (7024, 2828125), (7240, 2743750), (8780, 2262500), (9050, 2195000), (10000, 1986475), (10975, 1810000), (12500, 1589180), (14480, 1371875), (15625, 1271344), (17560, 1131250), (18100, 1097500), (21950, 905000), (22625, 878000), (25000, 794590), (31250, 635672), (35120, 565625), (36200, 548750), (43900, 452500), (45250, 439000), (50000, 397295), (54875, 362000), (62500, 317836), (72400, 274375), (79459, 250000), (87800, 226250), (90500, 219500), (109750, 181000), (113125, 175600), (125000, 158918)]