19807305

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:206

約数の個数: 64

約数和(自身を含む): 38320128

約数和(自身を除く): 18512823

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 43, 105, 107, 123, 129, 205, 215, 287, 301, 321, 535, 615, 645, 749, 861, 903, 1435, 1505, 1605, 1763, 2247, 3745, 4305, 4387, 4515, 4601, 5289, 8815, 11235, 12341, 13161, 13803, 21935, 23005, 26445, 30709, 32207, 37023, 61705, 65805, 69015, 92127, 96621, 153545, 161035, 185115, 188641, 460635, 483105, 565923, 943205, 1320487, 2829615, 3961461, 6602435, 19807305]

約数ペア:

[(1, 19807305), (3, 6602435), (5, 3961461), (7, 2829615), (15, 1320487), (21, 943205), (35, 565923), (41, 483105), (43, 460635), (105, 188641), (107, 185115), (123, 161035), (129, 153545), (205, 96621), (215, 92127), (287, 69015), (301, 65805), (321, 61705), (535, 37023), (615, 32207), (645, 30709), (749, 26445), (861, 23005), (903, 21935), (1435, 13803), (1505, 13161), (1605, 12341), (1763, 11235), (2247, 8815), (3745, 5289), (4305, 4601), (4387, 4515)]