21813909

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{1787}}^1$

素因数の和:2116

約数の個数: 16

約数和(自身を含む): 31440192

約数和(自身を除く): 9626283

約数列:

[1, 3, 13, 39, 313, 939, 1787, 4069, 5361, 12207, 23231, 69693, 559331, 1677993, 7271303, 21813909]

約数ペア:

[(1, 21813909), (3, 7271303), (13, 1677993), (39, 559331), (313, 69693), (939, 23231), (1787, 12207), (4069, 5361)]