209870401

素因数分解:

${\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 242506880

約数和(自身を除く): 32636479

約数列:

[1, 13, 37, 43, 73, 139, 481, 559, 949, 1591, 1807, 2701, 3139, 5143, 5977, 10147, 20683, 35113, 40807, 66859, 77701, 116143, 131911, 221149, 375439, 436321, 1509859, 2874937, 4880707, 5672173, 16143877, 209870401]

約数ペア:

[(1, 209870401), (13, 16143877), (37, 5672173), (43, 4880707), (73, 2874937), (139, 1509859), (481, 436321), (559, 375439), (949, 221149), (1591, 131911), (1807, 116143), (2701, 77701), (3139, 66859), (5143, 40807), (5977, 35113), (10147, 20683)]