20657000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1$

素因数の和:268

約数の個数: 128

約数和(自身を含む): 59754240

約数和(自身を除く): 39097240

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 25, 26, 28, 35, 40, 50, 52, 56, 65, 70, 91, 100, 104, 125, 130, 140, 175, 182, 200, 227, 250, 260, 280, 325, 350, 364, 454, 455, 500, 520, 650, 700, 728, 875, 908, 910, 1000, 1135, 1300, 1400, 1589, 1625, 1750, 1816, 1820, 2270, 2275, 2600, 2951, 3178, 3250, 3500, 3640, 4540, 4550, 5675, 5902, 6356, 6500, 7000, 7945, 9080, 9100, 11350, 11375, 11804, 12712, 13000, 14755, 15890, 18200, 20657, 22700, 22750, 23608, 28375, 29510, 31780, 39725, 41314, 45400, 45500, 56750, 59020, 63560, 73775, 79450, 82628, 91000, 103285, 113500, 118040, 147550, 158900, 165256, 198625, 206570, 227000, 295100, 317800, 368875, 397250, 413140, 516425, 590200, 737750, 794500, 826280, 1032850, 1475500, 1589000, 2065700, 2582125, 2951000, 4131400, 5164250, 10328500, 20657000]

約数ペア:

[(1, 20657000), (2, 10328500), (4, 5164250), (5, 4131400), (7, 2951000), (8, 2582125), (10, 2065700), (13, 1589000), (14, 1475500), (20, 1032850), (25, 826280), (26, 794500), (28, 737750), (35, 590200), (40, 516425), (50, 413140), (52, 397250), (56, 368875), (65, 317800), (70, 295100), (91, 227000), (100, 206570), (104, 198625), (125, 165256), (130, 158900), (140, 147550), (175, 118040), (182, 113500), (200, 103285), (227, 91000), (250, 82628), (260, 79450), (280, 73775), (325, 63560), (350, 59020), (364, 56750), (454, 45500), (455, 45400), (500, 41314), (520, 39725), (650, 31780), (700, 29510), (728, 28375), (875, 23608), (908, 22750), (910, 22700), (1000, 20657), (1135, 18200), (1300, 15890), (1400, 14755), (1589, 13000), (1625, 12712), (1750, 11804), (1816, 11375), (1820, 11350), (2270, 9100), (2275, 9080), (2600, 7945), (2951, 7000), (3178, 6500), (3250, 6356), (3500, 5902), (3640, 5675), (4540, 4550)]