20855280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{113}}^1\times {\mathrm{769}}^1$

素因数の和:898

約数の個数: 80

約数和(自身を含む): 65308320

約数和(自身を除く): 44453040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 113, 120, 226, 240, 339, 452, 565, 678, 769, 904, 1130, 1356, 1538, 1695, 1808, 2260, 2307, 2712, 3076, 3390, 3845, 4520, 4614, 5424, 6152, 6780, 7690, 9040, 9228, 11535, 12304, 13560, 15380, 18456, 23070, 27120, 30760, 36912, 46140, 61520, 86897, 92280, 173794, 184560, 260691, 347588, 434485, 521382, 695176, 868970, 1042764, 1303455, 1390352, 1737940, 2085528, 2606910, 3475880, 4171056, 5213820, 6951760, 10427640, 20855280]

約数ペア:

[(1, 20855280), (2, 10427640), (3, 6951760), (4, 5213820), (5, 4171056), (6, 3475880), (8, 2606910), (10, 2085528), (12, 1737940), (15, 1390352), (16, 1303455), (20, 1042764), (24, 868970), (30, 695176), (40, 521382), (48, 434485), (60, 347588), (80, 260691), (113, 184560), (120, 173794), (226, 92280), (240, 86897), (339, 61520), (452, 46140), (565, 36912), (678, 30760), (769, 27120), (904, 23070), (1130, 18456), (1356, 15380), (1538, 13560), (1695, 12304), (1808, 11535), (2260, 9228), (2307, 9040), (2712, 7690), (3076, 6780), (3390, 6152), (3845, 5424), (4520, 4614)]