20123887940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{409}}^1\times {\mathrm{14557}}^1$

素因数の和:15001

約数の個数: 72

約数和(自身を含む): 45876043080

約数和(自身を除く): 25752155140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 409, 676, 818, 845, 1636, 1690, 2045, 3380, 4090, 5317, 8180, 10634, 14557, 21268, 26585, 29114, 53170, 58228, 69121, 72785, 106340, 138242, 145570, 189241, 276484, 291140, 345605, 378482, 691210, 756964, 946205, 1382420, 1892410, 2460133, 3784820, 4920266, 5953813, 9840532, 11907626, 12300665, 23815252, 24601330, 29769065, 49202660, 59538130, 77399569, 119076260, 154799138, 309598276, 386997845, 773995690, 1006194397, 1547991380, 2012388794, 4024777588, 5030971985, 10061943970, 20123887940]

約数ペア:

[(1, 20123887940), (2, 10061943970), (4, 5030971985), (5, 4024777588), (10, 2012388794), (13, 1547991380), (20, 1006194397), (26, 773995690), (52, 386997845), (65, 309598276), (130, 154799138), (169, 119076260), (260, 77399569), (338, 59538130), (409, 49202660), (676, 29769065), (818, 24601330), (845, 23815252), (1636, 12300665), (1690, 11907626), (2045, 9840532), (3380, 5953813), (4090, 4920266), (5317, 3784820), (8180, 2460133), (10634, 1892410), (14557, 1382420), (21268, 946205), (26585, 756964), (29114, 691210), (53170, 378482), (58228, 345605), (69121, 291140), (72785, 276484), (106340, 189241), (138242, 145570)]