21318729

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{353}}^1\times {\mathrm{491}}^1$

素因数の和:888

約数の個数: 16

約数和(自身を含む): 29260224

約数和(自身を除く): 7941495

約数列:

[1, 3, 41, 123, 353, 491, 1059, 1473, 14473, 20131, 43419, 60393, 173323, 519969, 7106243, 21318729]

約数ペア:

[(1, 21318729), (3, 7106243), (41, 519969), (123, 173323), (353, 60393), (491, 43419), (1059, 20131), (1473, 14473)]