28564720

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:238

約数の個数: 80

約数和(自身を含む): 69424128

約数和(自身を除く): 40859408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 71, 80, 94, 107, 142, 188, 214, 235, 284, 355, 376, 428, 470, 535, 568, 710, 752, 856, 940, 1070, 1136, 1420, 1712, 1880, 2140, 2840, 3337, 3760, 4280, 5029, 5680, 6674, 7597, 8560, 10058, 13348, 15194, 16685, 20116, 25145, 26696, 30388, 33370, 37985, 40232, 50290, 53392, 60776, 66740, 75970, 80464, 100580, 121552, 133480, 151940, 201160, 266960, 303880, 357059, 402320, 607760, 714118, 1428236, 1785295, 2856472, 3570590, 5712944, 7141180, 14282360, 28564720]

約数ペア:

[(1, 28564720), (2, 14282360), (4, 7141180), (5, 5712944), (8, 3570590), (10, 2856472), (16, 1785295), (20, 1428236), (40, 714118), (47, 607760), (71, 402320), (80, 357059), (94, 303880), (107, 266960), (142, 201160), (188, 151940), (214, 133480), (235, 121552), (284, 100580), (355, 80464), (376, 75970), (428, 66740), (470, 60776), (535, 53392), (568, 50290), (710, 40232), (752, 37985), (856, 33370), (940, 30388), (1070, 26696), (1136, 25145), (1420, 20116), (1712, 16685), (1880, 15194), (2140, 13348), (2840, 10058), (3337, 8560), (3760, 7597), (4280, 6674), (5029, 5680)]