20648800

素因数分解:

$2^5\times 5^2\times {\mathrm{53}}^1\times {\mathrm{487}}^1$

素因数の和:560

約数の個数: 72

約数和(自身を含む): 51465456

約数和(自身を除く): 30816656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 53, 80, 100, 106, 160, 200, 212, 265, 400, 424, 487, 530, 800, 848, 974, 1060, 1325, 1696, 1948, 2120, 2435, 2650, 3896, 4240, 4870, 5300, 7792, 8480, 9740, 10600, 12175, 15584, 19480, 21200, 24350, 25811, 38960, 42400, 48700, 51622, 77920, 97400, 103244, 129055, 194800, 206488, 258110, 389600, 412976, 516220, 645275, 825952, 1032440, 1290550, 2064880, 2581100, 4129760, 5162200, 10324400, 20648800]

約数ペア:

[(1, 20648800), (2, 10324400), (4, 5162200), (5, 4129760), (8, 2581100), (10, 2064880), (16, 1290550), (20, 1032440), (25, 825952), (32, 645275), (40, 516220), (50, 412976), (53, 389600), (80, 258110), (100, 206488), (106, 194800), (160, 129055), (200, 103244), (212, 97400), (265, 77920), (400, 51622), (424, 48700), (487, 42400), (530, 38960), (800, 25811), (848, 24350), (974, 21200), (1060, 19480), (1325, 15584), (1696, 12175), (1948, 10600), (2120, 9740), (2435, 8480), (2650, 7792), (3896, 5300), (4240, 4870)]