258270940

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{65551}}^1$

素因数の和:65757

約数の個数: 24

約数和(自身を含む): 545130432

約数和(自身を除く): 286859492

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 65551, 131102, 262204, 327755, 655510, 1311020, 12913547, 25827094, 51654188, 64567735, 129135470, 258270940]

約数ペア:

[(1, 258270940), (2, 129135470), (4, 64567735), (5, 51654188), (10, 25827094), (20, 12913547), (197, 1311020), (394, 655510), (788, 327755), (985, 262204), (1970, 131102), (3940, 65551)]