18804680

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:366

約数の個数: 64

約数和(自身を含む): 45144000

約数和(自身を除く): 26339320

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 109, 152, 190, 218, 227, 380, 436, 454, 545, 760, 872, 908, 1090, 1135, 1816, 2071, 2180, 2270, 4142, 4313, 4360, 4540, 8284, 8626, 9080, 10355, 16568, 17252, 20710, 21565, 24743, 34504, 41420, 43130, 49486, 82840, 86260, 98972, 123715, 172520, 197944, 247430, 470117, 494860, 940234, 989720, 1880468, 2350585, 3760936, 4701170, 9402340, 18804680]

約数ペア:

[(1, 18804680), (2, 9402340), (4, 4701170), (5, 3760936), (8, 2350585), (10, 1880468), (19, 989720), (20, 940234), (38, 494860), (40, 470117), (76, 247430), (95, 197944), (109, 172520), (152, 123715), (190, 98972), (218, 86260), (227, 82840), (380, 49486), (436, 43130), (454, 41420), (545, 34504), (760, 24743), (872, 21565), (908, 20710), (1090, 17252), (1135, 16568), (1816, 10355), (2071, 9080), (2180, 8626), (2270, 8284), (4142, 4540), (4313, 4360)]