28721030

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{220931}}^1$

素因数の和:220951

約数の個数: 16

約数和(自身を含む): 55674864

約数和(自身を除く): 26953834

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 220931, 441862, 1104655, 2209310, 2872103, 5744206, 14360515, 28721030]

約数ペア:

[(1, 28721030), (2, 14360515), (5, 5744206), (10, 2872103), (13, 2209310), (26, 1104655), (65, 441862), (130, 220931)]