19499620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4493}}^1$

素因数の和:4540

約数の個数: 48

約数和(自身を含む): 48319488

約数和(自身を除く): 28819868

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4493, 8986, 17972, 22465, 31451, 44930, 62902, 89860, 125804, 139283, 157255, 278566, 314510, 557132, 629020, 696415, 974981, 1392830, 1949962, 2785660, 3899924, 4874905, 9749810, 19499620]

約数ペア:

[(1, 19499620), (2, 9749810), (4, 4874905), (5, 3899924), (7, 2785660), (10, 1949962), (14, 1392830), (20, 974981), (28, 696415), (31, 629020), (35, 557132), (62, 314510), (70, 278566), (124, 157255), (140, 139283), (155, 125804), (217, 89860), (310, 62902), (434, 44930), (620, 31451), (868, 22465), (1085, 17972), (2170, 8986), (4340, 4493)]