8731940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{643}}^1$

素因数の和:756

約数の個数: 48

約数和(自身を含む): 21205632

約数和(自身を除く): 12473692

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 485, 643, 679, 970, 1286, 1358, 1940, 2572, 2716, 3215, 3395, 4501, 6430, 6790, 9002, 12860, 13580, 18004, 22505, 45010, 62371, 90020, 124742, 249484, 311855, 436597, 623710, 873194, 1247420, 1746388, 2182985, 4365970, 8731940]

約数ペア:

[(1, 8731940), (2, 4365970), (4, 2182985), (5, 1746388), (7, 1247420), (10, 873194), (14, 623710), (20, 436597), (28, 311855), (35, 249484), (70, 124742), (97, 90020), (140, 62371), (194, 45010), (388, 22505), (485, 18004), (643, 13580), (679, 12860), (970, 9002), (1286, 6790), (1358, 6430), (1940, 4501), (2572, 3395), (2716, 3215)]