25808080

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{16979}}^1$

素因数の和:17011

約数の個数: 40

約数和(自身を含む): 63165600

約数和(自身を除く): 37357520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 16979, 33958, 67916, 84895, 135832, 169790, 271664, 322601, 339580, 645202, 679160, 1290404, 1358320, 1613005, 2580808, 3226010, 5161616, 6452020, 12904040, 25808080]

約数ペア:

[(1, 25808080), (2, 12904040), (4, 6452020), (5, 5161616), (8, 3226010), (10, 2580808), (16, 1613005), (19, 1358320), (20, 1290404), (38, 679160), (40, 645202), (76, 339580), (80, 322601), (95, 271664), (152, 169790), (190, 135832), (304, 84895), (380, 67916), (760, 33958), (1520, 16979)]