20979520

素因数分解:

$2^6\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1237}}^1$

素因数の和:1307

約数の個数: 56

約数和(自身を含む): 50941224

約数和(自身を除く): 29961704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 160, 212, 265, 320, 424, 530, 848, 1060, 1237, 1696, 2120, 2474, 3392, 4240, 4948, 6185, 8480, 9896, 12370, 16960, 19792, 24740, 39584, 49480, 65561, 79168, 98960, 131122, 197920, 262244, 327805, 395840, 524488, 655610, 1048976, 1311220, 2097952, 2622440, 4195904, 5244880, 10489760, 20979520]

約数ペア:

[(1, 20979520), (2, 10489760), (4, 5244880), (5, 4195904), (8, 2622440), (10, 2097952), (16, 1311220), (20, 1048976), (32, 655610), (40, 524488), (53, 395840), (64, 327805), (80, 262244), (106, 197920), (160, 131122), (212, 98960), (265, 79168), (320, 65561), (424, 49480), (530, 39584), (848, 24740), (1060, 19792), (1237, 16960), (1696, 12370), (2120, 9896), (2474, 8480), (3392, 6185), (4240, 4948)]