20396560

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1861}}^1$

素因数の和:2011

約数の個数: 40

約数和(自身を含む): 47793816

約数和(自身を除く): 27397256

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 274, 548, 685, 1096, 1370, 1861, 2192, 2740, 3722, 5480, 7444, 9305, 10960, 14888, 18610, 29776, 37220, 74440, 148880, 254957, 509914, 1019828, 1274785, 2039656, 2549570, 4079312, 5099140, 10198280, 20396560]

約数ペア:

[(1, 20396560), (2, 10198280), (4, 5099140), (5, 4079312), (8, 2549570), (10, 2039656), (16, 1274785), (20, 1019828), (40, 509914), (80, 254957), (137, 148880), (274, 74440), (548, 37220), (685, 29776), (1096, 18610), (1370, 14888), (1861, 10960), (2192, 9305), (2740, 7444), (3722, 5480)]