21019005

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1259}}^1$

素因数の和:1330

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 21437955

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 53, 63, 105, 159, 265, 315, 371, 477, 795, 1113, 1259, 1855, 2385, 3339, 3777, 5565, 6295, 8813, 11331, 16695, 18885, 26439, 44065, 56655, 66727, 79317, 132195, 200181, 333635, 396585, 467089, 600543, 1000905, 1401267, 2335445, 3002715, 4203801, 7006335, 21019005]

約数ペア:

[(1, 21019005), (3, 7006335), (5, 4203801), (7, 3002715), (9, 2335445), (15, 1401267), (21, 1000905), (35, 600543), (45, 467089), (53, 396585), (63, 333635), (105, 200181), (159, 132195), (265, 79317), (315, 66727), (371, 56655), (477, 44065), (795, 26439), (1113, 18885), (1259, 16695), (1855, 11331), (2385, 8813), (3339, 6295), (3777, 5565)]