639461872

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{300499}}^1$

素因数の和:300533

約数の個数: 40

約数和(自身を含む): 1490480000

約数和(自身を除く): 851018128

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 532, 1064, 2128, 300499, 600998, 1201996, 2103493, 2403992, 4206986, 4807984, 5709481, 8413972, 11418962, 16827944, 22837924, 33655888, 39966367, 45675848, 79932734, 91351696, 159865468, 319730936, 639461872]

約数ペア:

[(1, 639461872), (2, 319730936), (4, 159865468), (7, 91351696), (8, 79932734), (14, 45675848), (16, 39966367), (19, 33655888), (28, 22837924), (38, 16827944), (56, 11418962), (76, 8413972), (112, 5709481), (133, 4807984), (152, 4206986), (266, 2403992), (304, 2103493), (532, 1201996), (1064, 600998), (2128, 300499)]