21491253

素因数分解:

$3^2\times 7^2\times {\mathrm{48733}}^1$

素因数の和:48753

約数の個数: 18

約数和(自身を含む): 36111894

約数和(自身を除く): 14620641

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 48733, 146199, 341131, 438597, 1023393, 2387917, 3070179, 7163751, 21491253]

約数ペア:

[(1, 21491253), (3, 7163751), (7, 3070179), (9, 2387917), (21, 1023393), (49, 438597), (63, 341131), (147, 146199), (441, 48733)]