21491420

素因数分解:

$2^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{3079}}^1$

素因数の和:3437

約数の個数: 24

約数和(自身を含む): 45276000

約数和(自身を除く): 23784580

約数列:

[1, 2, 4, 5, 10, 20, 349, 698, 1396, 1745, 3079, 3490, 6158, 6980, 12316, 15395, 30790, 61580, 1074571, 2149142, 4298284, 5372855, 10745710, 21491420]

約数ペア:

[(1, 21491420), (2, 10745710), (4, 5372855), (5, 4298284), (10, 2149142), (20, 1074571), (349, 61580), (698, 30790), (1396, 15395), (1745, 12316), (3079, 6980), (3490, 6158)]