777940

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{401}}^1$

素因数の和:507

約数の個数: 24

約数和(自身を含む): 1654632

約数和(自身を除く): 876692

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 401, 485, 802, 970, 1604, 1940, 2005, 4010, 8020, 38897, 77794, 155588, 194485, 388970, 777940]

約数ペア:

[(1, 777940), (2, 388970), (4, 194485), (5, 155588), (10, 77794), (20, 38897), (97, 8020), (194, 4010), (388, 2005), (401, 1940), (485, 1604), (802, 970)]