278877480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{331997}}^1$

素因数の和:332018

約数の個数: 64

約数和(自身を含む): 956154240

約数和(自身を除く): 677276760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 331997, 663994, 995991, 1327988, 1659985, 1991982, 2323979, 2655976, 3319970, 3983964, 4647958, 4979955, 6639940, 6971937, 7967928, 9295916, 9959910, 11619895, 13279880, 13943874, 18591832, 19919820, 23239790, 27887748, 34859685, 39839640, 46479580, 55775496, 69719370, 92959160, 139438740, 278877480]

約数ペア:

[(1, 278877480), (2, 139438740), (3, 92959160), (4, 69719370), (5, 55775496), (6, 46479580), (7, 39839640), (8, 34859685), (10, 27887748), (12, 23239790), (14, 19919820), (15, 18591832), (20, 13943874), (21, 13279880), (24, 11619895), (28, 9959910), (30, 9295916), (35, 7967928), (40, 6971937), (42, 6639940), (56, 4979955), (60, 4647958), (70, 3983964), (84, 3319970), (105, 2655976), (120, 2323979), (140, 1991982), (168, 1659985), (210, 1327988), (280, 995991), (420, 663994), (840, 331997)]