18881390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{439}}^1$

素因数の和:497

約数の個数: 64

約数和(自身を含む): 41057280

約数和(自身を除く): 22175890

約数列:

[1, 2, 5, 10, 11, 17, 22, 23, 34, 46, 55, 85, 110, 115, 170, 187, 230, 253, 374, 391, 439, 506, 782, 878, 935, 1265, 1870, 1955, 2195, 2530, 3910, 4301, 4390, 4829, 7463, 8602, 9658, 10097, 14926, 20194, 21505, 24145, 37315, 43010, 48290, 50485, 74630, 82093, 100970, 111067, 164186, 171649, 222134, 343298, 410465, 555335, 820930, 858245, 1110670, 1716490, 1888139, 3776278, 9440695, 18881390]

約数ペア:

[(1, 18881390), (2, 9440695), (5, 3776278), (10, 1888139), (11, 1716490), (17, 1110670), (22, 858245), (23, 820930), (34, 555335), (46, 410465), (55, 343298), (85, 222134), (110, 171649), (115, 164186), (170, 111067), (187, 100970), (230, 82093), (253, 74630), (374, 50485), (391, 48290), (439, 43010), (506, 37315), (782, 24145), (878, 21505), (935, 20194), (1265, 14926), (1870, 10097), (1955, 9658), (2195, 8602), (2530, 7463), (3910, 4829), (4301, 4390)]