20511520

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7541}}^1$

素因数の和:7573

約数の個数: 48

約数和(自身を含む): 51315768

約数和(自身を除く): 30804248

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7541, 15082, 30164, 37705, 60328, 75410, 120656, 128197, 150820, 241312, 256394, 301640, 512788, 603280, 640985, 1025576, 1206560, 1281970, 2051152, 2563940, 4102304, 5127880, 10255760, 20511520]

約数ペア:

[(1, 20511520), (2, 10255760), (4, 5127880), (5, 4102304), (8, 2563940), (10, 2051152), (16, 1281970), (17, 1206560), (20, 1025576), (32, 640985), (34, 603280), (40, 512788), (68, 301640), (80, 256394), (85, 241312), (136, 150820), (160, 128197), (170, 120656), (272, 75410), (340, 60328), (544, 37705), (680, 30164), (1360, 15082), (2720, 7541)]