20720800

素因数分解:

$2^5\times 5^2\times {\mathrm{59}}^1\times {\mathrm{439}}^1$

素因数の和:518

約数の個数: 72

約数和(自身を含む): 51559200

約数和(自身を除く): 30838400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 59, 80, 100, 118, 160, 200, 236, 295, 400, 439, 472, 590, 800, 878, 944, 1180, 1475, 1756, 1888, 2195, 2360, 2950, 3512, 4390, 4720, 5900, 7024, 8780, 9440, 10975, 11800, 14048, 17560, 21950, 23600, 25901, 35120, 43900, 47200, 51802, 70240, 87800, 103604, 129505, 175600, 207208, 259010, 351200, 414416, 518020, 647525, 828832, 1036040, 1295050, 2072080, 2590100, 4144160, 5180200, 10360400, 20720800]

約数ペア:

[(1, 20720800), (2, 10360400), (4, 5180200), (5, 4144160), (8, 2590100), (10, 2072080), (16, 1295050), (20, 1036040), (25, 828832), (32, 647525), (40, 518020), (50, 414416), (59, 351200), (80, 259010), (100, 207208), (118, 175600), (160, 129505), (200, 103604), (236, 87800), (295, 70240), (400, 51802), (439, 47200), (472, 43900), (590, 35120), (800, 25901), (878, 23600), (944, 21950), (1180, 17560), (1475, 14048), (1756, 11800), (1888, 10975), (2195, 9440), (2360, 8780), (2950, 7024), (3512, 5900), (4390, 4720)]