31781421

素因数分解:

$3^2\times 7^1\times {\mathrm{641}}^1\times {\mathrm{787}}^1$

素因数の和:1441

約数の個数: 24

約数和(自身を含む): 52613184

約数和(自身を除く): 20831763

約数列:

[1, 3, 7, 9, 21, 63, 641, 787, 1923, 2361, 4487, 5509, 5769, 7083, 13461, 16527, 40383, 49581, 504467, 1513401, 3531269, 4540203, 10593807, 31781421]

約数ペア:

[(1, 31781421), (3, 10593807), (7, 4540203), (9, 3531269), (21, 1513401), (63, 504467), (641, 49581), (787, 40383), (1923, 16527), (2361, 13461), (4487, 7083), (5509, 5769)]