20898891

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:337

約数の個数: 40

約数和(自身を含む): 34151040

約数和(自身を除く): 13252149

約数列:

[1, 3, 9, 13, 27, 39, 81, 89, 117, 223, 267, 351, 669, 801, 1053, 1157, 2007, 2403, 2899, 3471, 6021, 7209, 8697, 10413, 18063, 19847, 26091, 31239, 59541, 78273, 93717, 178623, 234819, 258011, 535869, 774033, 1607607, 2322099, 6966297, 20898891]

約数ペア:

[(1, 20898891), (3, 6966297), (9, 2322099), (13, 1607607), (27, 774033), (39, 535869), (81, 258011), (89, 234819), (117, 178623), (223, 93717), (267, 78273), (351, 59541), (669, 31239), (801, 26091), (1053, 19847), (1157, 18063), (2007, 10413), (2403, 8697), (2899, 7209), (3471, 6021)]