19985210

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{3911}}^1$

素因数の和:3998

約数の個数: 32

約数和(自身を含む): 41686272

約数和(自身を除く): 21701062

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 73, 146, 365, 511, 730, 1022, 2555, 3911, 5110, 7822, 19555, 27377, 39110, 54754, 136885, 273770, 285503, 571006, 1427515, 1998521, 2855030, 3997042, 9992605, 19985210]

約数ペア:

[(1, 19985210), (2, 9992605), (5, 3997042), (7, 2855030), (10, 1998521), (14, 1427515), (35, 571006), (70, 285503), (73, 273770), (146, 136885), (365, 54754), (511, 39110), (730, 27377), (1022, 19555), (2555, 7822), (3911, 5110)]