419780

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:299

約数の個数: 24

約数和(自身を含む): 893760

約数和(自身を除く): 473980

約数列:

[1, 2, 4, 5, 10, 20, 139, 151, 278, 302, 556, 604, 695, 755, 1390, 1510, 2780, 3020, 20989, 41978, 83956, 104945, 209890, 419780]

約数ペア:

[(1, 419780), (2, 209890), (4, 104945), (5, 83956), (10, 41978), (20, 20989), (139, 3020), (151, 2780), (278, 1510), (302, 1390), (556, 755), (604, 695)]