21891021

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{5261}}^1$

素因数の和:5356

約数の個数: 16

約数和(自身を含む): 31151040

約数和(自身を除く): 9260019

約数列:

[1, 3, 19, 57, 73, 219, 1387, 4161, 5261, 15783, 99959, 299877, 384053, 1152159, 7297007, 21891021]

約数ペア:

[(1, 21891021), (3, 7297007), (19, 1152159), (57, 384053), (73, 299877), (219, 99959), (1387, 15783), (4161, 5261)]