19811885

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{3821}}^1$

素因数の和:3904

約数の個数: 16

約数和(自身を含む): 25592112

約数和(自身を除く): 5780227

約数列:

[1, 5, 17, 61, 85, 305, 1037, 3821, 5185, 19105, 64957, 233081, 324785, 1165405, 3962377, 19811885]

約数ペア:

[(1, 19811885), (5, 3962377), (17, 1165405), (61, 324785), (85, 233081), (305, 64957), (1037, 19105), (3821, 5185)]