251117853

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{4091}}^1$

素因数の和:4217

約数の個数: 32

約数和(自身を含む): 398069760

約数和(自身を除く): 146951907

約数列:

[1, 3, 7, 21, 37, 79, 111, 237, 259, 553, 777, 1659, 2923, 4091, 8769, 12273, 20461, 28637, 61383, 85911, 151367, 323189, 454101, 969567, 1059569, 2262323, 3178707, 6786969, 11957993, 35873979, 83705951, 251117853]

約数ペア:

[(1, 251117853), (3, 83705951), (7, 35873979), (21, 11957993), (37, 6786969), (79, 3178707), (111, 2262323), (237, 1059569), (259, 969567), (553, 454101), (777, 323189), (1659, 151367), (2923, 85911), (4091, 61383), (8769, 28637), (12273, 20461)]