278319640

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{68891}}^1$

素因数の和:69003

約数の個数: 32

約数和(自身を含む): 632428560

約数和(自身を除く): 354108920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 68891, 137782, 275564, 344455, 551128, 688910, 1377820, 2755640, 6957991, 13915982, 27831964, 34789955, 55663928, 69579910, 139159820, 278319640]

約数ペア:

[(1, 278319640), (2, 139159820), (4, 69579910), (5, 55663928), (8, 34789955), (10, 27831964), (20, 13915982), (40, 6957991), (101, 2755640), (202, 1377820), (404, 688910), (505, 551128), (808, 344455), (1010, 275564), (2020, 137782), (4040, 68891)]