21240495

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3659}}^1$

素因数の和:3716

約数の個数: 32

約数和(自身を含む): 38649600

約数和(自身を除く): 17409105

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 129, 135, 215, 387, 645, 1161, 1935, 3659, 5805, 10977, 18295, 32931, 54885, 98793, 157337, 164655, 472011, 493965, 786685, 1416033, 2360055, 4248099, 7080165, 21240495]

約数ペア:

[(1, 21240495), (3, 7080165), (5, 4248099), (9, 2360055), (15, 1416033), (27, 786685), (43, 493965), (45, 472011), (129, 164655), (135, 157337), (215, 98793), (387, 54885), (645, 32931), (1161, 18295), (1935, 10977), (3659, 5805)]