257797410

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{661019}}^1$

素因数の和:661042

約数の個数: 32

約数和(自身を含む): 666308160

約数和(自身を除く): 408510750

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 661019, 1322038, 1983057, 3305095, 3966114, 6610190, 8593247, 9915285, 17186494, 19830570, 25779741, 42966235, 51559482, 85932470, 128898705, 257797410]

約数ペア:

[(1, 257797410), (2, 128898705), (3, 85932470), (5, 51559482), (6, 42966235), (10, 25779741), (13, 19830570), (15, 17186494), (26, 9915285), (30, 8593247), (39, 6610190), (65, 3966114), (78, 3305095), (130, 1983057), (195, 1322038), (390, 661019)]