278329940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{28001}}^1$

素因数の和:28088

約数の個数: 48

約数和(自身を含む): 677424384

約数和(自身を除く): 399094444

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 9940, 28001, 56002, 112004, 140005, 196007, 280010, 392014, 560020, 784028, 980035, 1960070, 1988071, 3920140, 3976142, 7952284, 9940355, 13916497, 19880710, 27832994, 39761420, 55665988, 69582485, 139164970, 278329940]

約数ペア:

[(1, 278329940), (2, 139164970), (4, 69582485), (5, 55665988), (7, 39761420), (10, 27832994), (14, 19880710), (20, 13916497), (28, 9940355), (35, 7952284), (70, 3976142), (71, 3920140), (140, 1988071), (142, 1960070), (284, 980035), (355, 784028), (497, 560020), (710, 392014), (994, 280010), (1420, 196007), (1988, 140005), (2485, 112004), (4970, 56002), (9940, 28001)]