21408945

素因数分解:

$3^1\times 5^1\times {\mathrm{367}}^1\times {\mathrm{3889}}^1$

素因数の和:4264

約数の個数: 16

約数和(自身を含む): 34356480

約数和(自身を除く): 12947535

約数列:

[1, 3, 5, 15, 367, 1101, 1835, 3889, 5505, 11667, 19445, 58335, 1427263, 4281789, 7136315, 21408945]

約数ペア:

[(1, 21408945), (3, 7136315), (5, 4281789), (15, 1427263), (367, 58335), (1101, 19445), (1835, 11667), (3889, 5505)]