21557679

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1621}}^1$

素因数の和:1679

約数の個数: 32

約数和(自身を含む): 34879488

約数和(自身を除く): 13321809

約数列:

[1, 3, 11, 13, 31, 33, 39, 93, 143, 341, 403, 429, 1023, 1209, 1621, 4433, 4863, 13299, 17831, 21073, 50251, 53493, 63219, 150753, 231803, 552761, 653263, 695409, 1658283, 1959789, 7185893, 21557679]

約数ペア:

[(1, 21557679), (3, 7185893), (11, 1959789), (13, 1658283), (31, 695409), (33, 653263), (39, 552761), (93, 231803), (143, 150753), (341, 63219), (403, 53493), (429, 50251), (1023, 21073), (1209, 17831), (1621, 13299), (4433, 4863)]