12920560

素因数分解:

$2^4\times 5^1\times {\mathrm{161507}}^1$

素因数の和:161520

約数の個数: 20

約数和(自身を含む): 30040488

約数和(自身を除く): 17119928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161507, 323014, 646028, 807535, 1292056, 1615070, 2584112, 3230140, 6460280, 12920560]

約数ペア:

[(1, 12920560), (2, 6460280), (4, 3230140), (5, 2584112), (8, 1615070), (10, 1292056), (16, 807535), (20, 646028), (40, 323014), (80, 161507)]