639453808

素因数分解:

$2^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{72271}}^1$

素因数の和:72365

約数の個数: 40

約数和(自身を含む): 1433876480

約数和(自身を除く): 794422672

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 79, 112, 158, 316, 553, 632, 1106, 1264, 2212, 4424, 8848, 72271, 144542, 289084, 505897, 578168, 1011794, 1156336, 2023588, 4047176, 5709409, 8094352, 11418818, 22837636, 39965863, 45675272, 79931726, 91350544, 159863452, 319726904, 639453808]

約数ペア:

[(1, 639453808), (2, 319726904), (4, 159863452), (7, 91350544), (8, 79931726), (14, 45675272), (16, 39965863), (28, 22837636), (56, 11418818), (79, 8094352), (112, 5709409), (158, 4047176), (316, 2023588), (553, 1156336), (632, 1011794), (1106, 578168), (1264, 505897), (2212, 289084), (4424, 144542), (8848, 72271)]