20801248

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1613}}^1$

素因数の和:1667

約数の個数: 48

約数和(自身を含む): 45553536

約数和(自身を除く): 24752288

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 104, 124, 208, 248, 403, 416, 496, 806, 992, 1612, 1613, 3224, 3226, 6448, 6452, 12896, 12904, 20969, 25808, 41938, 50003, 51616, 83876, 100006, 167752, 200012, 335504, 400024, 650039, 671008, 800048, 1300078, 1600096, 2600156, 5200312, 10400624, 20801248]

約数ペア:

[(1, 20801248), (2, 10400624), (4, 5200312), (8, 2600156), (13, 1600096), (16, 1300078), (26, 800048), (31, 671008), (32, 650039), (52, 400024), (62, 335504), (104, 200012), (124, 167752), (208, 100006), (248, 83876), (403, 51616), (416, 50003), (496, 41938), (806, 25808), (992, 20969), (1612, 12904), (1613, 12896), (3224, 6452), (3226, 6448)]