2166381

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{251}}^1$

素因数の和:401

約数の個数: 24

約数和(自身を含む): 3616704

約数和(自身を除く): 1450323

約数列:

[1, 3, 7, 9, 21, 63, 137, 251, 411, 753, 959, 1233, 1757, 2259, 2877, 5271, 8631, 15813, 34387, 103161, 240709, 309483, 722127, 2166381]

約数ペア:

[(1, 2166381), (3, 722127), (7, 309483), (9, 240709), (21, 103161), (63, 34387), (137, 15813), (251, 8631), (411, 5271), (753, 2877), (959, 2259), (1233, 1757)]