19809790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1979}}^1$

素因数の和:2017

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 28090370

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 55, 65, 70, 77, 91, 110, 130, 143, 154, 182, 286, 385, 455, 715, 770, 910, 1001, 1430, 1979, 2002, 3958, 5005, 9895, 10010, 13853, 19790, 21769, 25727, 27706, 43538, 51454, 69265, 108845, 128635, 138530, 152383, 180089, 217690, 257270, 282997, 304766, 360178, 565994, 761915, 900445, 1414985, 1523830, 1800890, 1980979, 2829970, 3961958, 9904895, 19809790]

約数ペア:

[(1, 19809790), (2, 9904895), (5, 3961958), (7, 2829970), (10, 1980979), (11, 1800890), (13, 1523830), (14, 1414985), (22, 900445), (26, 761915), (35, 565994), (55, 360178), (65, 304766), (70, 282997), (77, 257270), (91, 217690), (110, 180089), (130, 152383), (143, 138530), (154, 128635), (182, 108845), (286, 69265), (385, 51454), (455, 43538), (715, 27706), (770, 25727), (910, 21769), (1001, 19790), (1430, 13853), (1979, 10010), (2002, 9895), (3958, 5005)]