19991108

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{1543}}^1$

素因数の和:1667

約数の個数: 24

約数和(自身を含む): 36314880

約数和(自身を除く): 16323772

約数列:

[1, 2, 4, 41, 79, 82, 158, 164, 316, 1543, 3086, 3239, 6172, 6478, 12956, 63263, 121897, 126526, 243794, 253052, 487588, 4997777, 9995554, 19991108]

約数ペア:

[(1, 19991108), (2, 9995554), (4, 4997777), (41, 487588), (79, 253052), (82, 243794), (158, 126526), (164, 121897), (316, 63263), (1543, 12956), (3086, 6478), (3239, 6172)]