21781845

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{9491}}^1$

素因数の和:9522

約数の個数: 32

約数和(自身を含む): 41005440

約数和(自身を除く): 19223595

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 459, 765, 2295, 9491, 28473, 47455, 85419, 142365, 161347, 256257, 427095, 484041, 806735, 1281285, 1452123, 2420205, 4356369, 7260615, 21781845]

約数ペア:

[(1, 21781845), (3, 7260615), (5, 4356369), (9, 2420205), (15, 1452123), (17, 1281285), (27, 806735), (45, 484041), (51, 427095), (85, 256257), (135, 161347), (153, 142365), (255, 85419), (459, 47455), (765, 28473), (2295, 9491)]