21118916

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{4463}}^1$

素因数の和:4500

約数の個数: 36

約数和(自身を含む): 45747072

約数和(自身を除く): 24628156

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 169, 182, 338, 364, 676, 1183, 2366, 4463, 4732, 8926, 17852, 31241, 58019, 62482, 116038, 124964, 232076, 406133, 754247, 812266, 1508494, 1624532, 3016988, 5279729, 10559458, 21118916]

約数ペア:

[(1, 21118916), (2, 10559458), (4, 5279729), (7, 3016988), (13, 1624532), (14, 1508494), (26, 812266), (28, 754247), (52, 406133), (91, 232076), (169, 124964), (182, 116038), (338, 62482), (364, 58019), (676, 31241), (1183, 17852), (2366, 8926), (4463, 4732)]