18019705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 24748416

約数和(自身を除く): 6728711

約数列:

[1, 5, 11, 41, 55, 61, 131, 205, 305, 451, 655, 671, 1441, 2255, 2501, 3355, 5371, 7205, 7991, 12505, 26855, 27511, 39955, 59081, 87901, 137555, 295405, 327631, 439505, 1638155, 3603941, 18019705]

約数ペア:

[(1, 18019705), (5, 3603941), (11, 1638155), (41, 439505), (55, 327631), (61, 295405), (131, 137555), (205, 87901), (305, 59081), (451, 39955), (655, 27511), (671, 26855), (1441, 12505), (2255, 7991), (2501, 7205), (3355, 5371)]