21490917

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{19309}}^1$

素因数の和:19372

約数の個数: 16

約数和(自身を含む): 33367680

約数和(自身を除く): 11876763

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 19309, 57927, 135163, 405489, 1023377, 3070131, 7163639, 21490917]

約数ペア:

[(1, 21490917), (3, 7163639), (7, 3070131), (21, 1023377), (53, 405489), (159, 135163), (371, 57927), (1113, 19309)]