20990541

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{433}}^1$

素因数の和:573

約数の個数: 32

約数和(自身を含む): 33247872

約数和(自身を除く): 12257331

約数列:

[1, 3, 11, 13, 33, 39, 113, 143, 339, 429, 433, 1243, 1299, 1469, 3729, 4407, 4763, 5629, 14289, 16159, 16887, 48477, 48929, 61919, 146787, 185757, 538219, 636077, 1614657, 1908231, 6996847, 20990541]

約数ペア:

[(1, 20990541), (3, 6996847), (11, 1908231), (13, 1614657), (33, 636077), (39, 538219), (113, 185757), (143, 146787), (339, 61919), (429, 48929), (433, 48477), (1243, 16887), (1299, 16159), (1469, 14289), (3729, 5629), (4407, 4763)]