12840560

素因数分解:

$2^4\times 5^1\times {\mathrm{160507}}^1$

素因数の和:160520

約数の個数: 20

約数和(自身を含む): 29854488

約数和(自身を除く): 17013928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 160507, 321014, 642028, 802535, 1284056, 1605070, 2568112, 3210140, 6420280, 12840560]

約数ペア:

[(1, 12840560), (2, 6420280), (4, 3210140), (5, 2568112), (8, 1605070), (10, 1284056), (16, 802535), (20, 642028), (40, 321014), (80, 160507)]