21991053

素因数分解:

$3^1\times 7^2\times {\mathrm{211}}^1\times {\mathrm{709}}^1$

素因数の和:937

約数の個数: 24

約数和(自身を含む): 34318560

約数和(自身を除く): 12327507

約数列:

[1, 3, 7, 21, 49, 147, 211, 633, 709, 1477, 2127, 4431, 4963, 10339, 14889, 31017, 34741, 104223, 149599, 448797, 1047193, 3141579, 7330351, 21991053]

約数ペア:

[(1, 21991053), (3, 7330351), (7, 3141579), (21, 1047193), (49, 448797), (147, 149599), (211, 104223), (633, 34741), (709, 31017), (1477, 14889), (2127, 10339), (4431, 4963)]