21315015

素因数分解:

$3^3\times 5^1\times {\mathrm{157889}}^1$

素因数の和:157903

約数の個数: 16

約数和(自身を含む): 37893600

約数和(自身を除く): 16578585

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157889, 473667, 789445, 1421001, 2368335, 4263003, 7105005, 21315015]

約数ペア:

[(1, 21315015), (3, 7105005), (5, 4263003), (9, 2368335), (15, 1421001), (27, 789445), (45, 473667), (135, 157889)]