28210780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{108503}}^1$

素因数の和:108525

約数の個数: 24

約数和(自身を含む): 63800352

約数和(自身を除く): 35589572

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 108503, 217006, 434012, 542515, 1085030, 1410539, 2170060, 2821078, 5642156, 7052695, 14105390, 28210780]

約数ペア:

[(1, 28210780), (2, 14105390), (4, 7052695), (5, 5642156), (10, 2821078), (13, 2170060), (20, 1410539), (26, 1085030), (52, 542515), (65, 434012), (130, 217006), (260, 108503)]