21396015

素因数分解:

$3^3\times 5^1\times {\mathrm{158489}}^1$

素因数の和:158503

約数の個数: 16

約数和(自身を含む): 38037600

約数和(自身を除く): 16641585

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 158489, 475467, 792445, 1426401, 2377335, 4279203, 7132005, 21396015]

約数ペア:

[(1, 21396015), (3, 7132005), (5, 4279203), (9, 2377335), (15, 1426401), (27, 792445), (45, 475467), (135, 158489)]