15778721

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:189

約数の個数: 32

約数和(自身を含む): 20275200

約数和(自身を除く): 4496479

約数列:

[1, 7, 19, 31, 43, 89, 133, 217, 301, 589, 623, 817, 1333, 1691, 2759, 3827, 4123, 5719, 9331, 11837, 19313, 25327, 26789, 52421, 72713, 118637, 177289, 366947, 508991, 830459, 2254103, 15778721]

約数ペア:

[(1, 15778721), (7, 2254103), (19, 830459), (31, 508991), (43, 366947), (89, 177289), (133, 118637), (217, 72713), (301, 52421), (589, 26789), (623, 25327), (817, 19313), (1333, 11837), (1691, 9331), (2759, 5719), (3827, 4123)]