19954905

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:577

約数の個数: 32

約数和(自身を含む): 33239808

約数和(自身を除く): 13284903

約数列:

[1, 3, 5, 15, 41, 71, 123, 205, 213, 355, 457, 615, 1065, 1371, 2285, 2911, 6855, 8733, 14555, 18737, 32447, 43665, 56211, 93685, 97341, 162235, 281055, 486705, 1330327, 3990981, 6651635, 19954905]

約数ペア:

[(1, 19954905), (3, 6651635), (5, 3990981), (15, 1330327), (41, 486705), (71, 281055), (123, 162235), (205, 97341), (213, 93685), (355, 56211), (457, 43665), (615, 32447), (1065, 18737), (1371, 14555), (2285, 8733), (2911, 6855)]