154780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:189

約数の個数: 24

約数和(自身を含む): 332640

約数和(自身を除く): 177860

約数列:

[1, 2, 4, 5, 10, 20, 71, 109, 142, 218, 284, 355, 436, 545, 710, 1090, 1420, 2180, 7739, 15478, 30956, 38695, 77390, 154780]

約数ペア:

[(1, 154780), (2, 77390), (4, 38695), (5, 30956), (10, 15478), (20, 7739), (71, 2180), (109, 1420), (142, 1090), (218, 710), (284, 545), (355, 436)]