278380420

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{21647}}^1$

素因数の和:22299

約数の個数: 24

約数和(自身を含む): 585535104

約数和(自身を除く): 307154684

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 2572, 3215, 6430, 12860, 21647, 43294, 86588, 108235, 216470, 432940, 13919021, 27838042, 55676084, 69595105, 139190210, 278380420]

約数ペア:

[(1, 278380420), (2, 139190210), (4, 69595105), (5, 55676084), (10, 27838042), (20, 13919021), (643, 432940), (1286, 216470), (2572, 108235), (3215, 86588), (6430, 43294), (12860, 21647)]