21290865

素因数分解:

$3^1\times 5^1\times {\mathrm{1091}}^1\times {\mathrm{1301}}^1$

素因数の和:2400

約数の個数: 16

約数和(自身を含む): 34122816

約数和(自身を除く): 12831951

約数列:

[1, 3, 5, 15, 1091, 1301, 3273, 3903, 5455, 6505, 16365, 19515, 1419391, 4258173, 7096955, 21290865]

約数ペア:

[(1, 21290865), (3, 7096955), (5, 4258173), (15, 1419391), (1091, 19515), (1301, 16365), (3273, 6505), (3903, 5455)]