21396660

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^2$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 63527520

約数和(自身を除く): 42130860

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 76, 95, 114, 137, 190, 228, 274, 285, 380, 411, 548, 570, 685, 822, 1140, 1370, 1644, 2055, 2603, 2740, 4110, 5206, 7809, 8220, 10412, 13015, 15618, 18769, 26030, 31236, 37538, 39045, 52060, 56307, 75076, 78090, 93845, 112614, 156180, 187690, 225228, 281535, 356611, 375380, 563070, 713222, 1069833, 1126140, 1426444, 1783055, 2139666, 3566110, 4279332, 5349165, 7132220, 10698330, 21396660]

約数ペア:

[(1, 21396660), (2, 10698330), (3, 7132220), (4, 5349165), (5, 4279332), (6, 3566110), (10, 2139666), (12, 1783055), (15, 1426444), (19, 1126140), (20, 1069833), (30, 713222), (38, 563070), (57, 375380), (60, 356611), (76, 281535), (95, 225228), (114, 187690), (137, 156180), (190, 112614), (228, 93845), (274, 78090), (285, 75076), (380, 56307), (411, 52060), (548, 39045), (570, 37538), (685, 31236), (822, 26030), (1140, 18769), (1370, 15618), (1644, 13015), (2055, 10412), (2603, 8220), (2740, 7809), (4110, 5206)]