28871690

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{20771}}^1$

素因数の和:20917

約数の個数: 16

約数和(自身を含む): 52345440

約数和(自身を除く): 23473750

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 20771, 41542, 103855, 207710, 2887169, 5774338, 14435845, 28871690]

約数ペア:

[(1, 28871690), (2, 14435845), (5, 5774338), (10, 2887169), (139, 207710), (278, 103855), (695, 41542), (1390, 20771)]