21690045

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{727}}^1$

素因数の和:771

約数の個数: 64

約数和(自身を含む): 44029440

約数和(自身を除く): 22339395

約数列:

[1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 65, 85, 117, 135, 153, 195, 221, 255, 351, 459, 585, 663, 727, 765, 1105, 1755, 1989, 2181, 2295, 3315, 3635, 5967, 6543, 9451, 9945, 10905, 12359, 19629, 28353, 29835, 32715, 37077, 47255, 61795, 85059, 98145, 111231, 141765, 160667, 185385, 255177, 333693, 425295, 482001, 556155, 803335, 1275885, 1446003, 1668465, 2410005, 4338009, 7230015, 21690045]

約数ペア:

[(1, 21690045), (3, 7230015), (5, 4338009), (9, 2410005), (13, 1668465), (15, 1446003), (17, 1275885), (27, 803335), (39, 556155), (45, 482001), (51, 425295), (65, 333693), (85, 255177), (117, 185385), (135, 160667), (153, 141765), (195, 111231), (221, 98145), (255, 85059), (351, 61795), (459, 47255), (585, 37077), (663, 32715), (727, 29835), (765, 28353), (1105, 19629), (1755, 12359), (1989, 10905), (2181, 9945), (2295, 9451), (3315, 6543), (3635, 5967)]