28340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1$

素因数の和:131

約数の個数: 24

約数和(自身を含む): 64680

約数和(自身を除く): 36340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 109, 130, 218, 260, 436, 545, 1090, 1417, 2180, 2834, 5668, 7085, 14170, 28340]

約数ペア:

[(1, 28340), (2, 14170), (4, 7085), (5, 5668), (10, 2834), (13, 2180), (20, 1417), (26, 1090), (52, 545), (65, 436), (109, 260), (130, 218)]