21708945

素因数分解:

$3^3\times 5^1\times {\mathrm{160807}}^1$

素因数の和:160821

約数の個数: 16

約数和(自身を含む): 38593920

約数和(自身を除く): 16884975

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 160807, 482421, 804035, 1447263, 2412105, 4341789, 7236315, 21708945]

約数ペア:

[(1, 21708945), (3, 7236315), (5, 4341789), (9, 2412105), (15, 1447263), (27, 804035), (45, 482421), (135, 160807)]