20108860

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{137}}^1\times {\mathrm{179}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 43817760

約数和(自身を除く): 23708900

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 137, 164, 179, 205, 274, 358, 410, 548, 685, 716, 820, 895, 1370, 1790, 2740, 3580, 5617, 7339, 11234, 14678, 22468, 24523, 28085, 29356, 36695, 49046, 56170, 73390, 98092, 112340, 122615, 146780, 245230, 490460, 1005443, 2010886, 4021772, 5027215, 10054430, 20108860]

約数ペア:

[(1, 20108860), (2, 10054430), (4, 5027215), (5, 4021772), (10, 2010886), (20, 1005443), (41, 490460), (82, 245230), (137, 146780), (164, 122615), (179, 112340), (205, 98092), (274, 73390), (358, 56170), (410, 49046), (548, 36695), (685, 29356), (716, 28085), (820, 24523), (895, 22468), (1370, 14678), (1790, 11234), (2740, 7339), (3580, 5617)]