21776820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27919}}^1$

素因数の和:27944

約数の個数: 48

約数和(自身を含む): 65667840

約数和(自身を除く): 43891020

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27919, 55838, 83757, 111676, 139595, 167514, 279190, 335028, 362947, 418785, 558380, 725894, 837570, 1088841, 1451788, 1675140, 1814735, 2177682, 3629470, 4355364, 5444205, 7258940, 10888410, 21776820]

約数ペア:

[(1, 21776820), (2, 10888410), (3, 7258940), (4, 5444205), (5, 4355364), (6, 3629470), (10, 2177682), (12, 1814735), (13, 1675140), (15, 1451788), (20, 1088841), (26, 837570), (30, 725894), (39, 558380), (52, 418785), (60, 362947), (65, 335028), (78, 279190), (130, 167514), (156, 139595), (195, 111676), (260, 83757), (390, 55838), (780, 27919)]