21000739235

素因数分解:

$5^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{644491}}^1$

素因数の和:644536

約数の個数: 32

約数和(自身を含む): 30935616000

約数和(自身を除く): 9934876765

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 343, 665, 931, 1715, 4655, 6517, 32585, 644491, 3222455, 4511437, 12245329, 22557185, 31580059, 61226645, 85717303, 157900295, 221060413, 428586515, 600021121, 1105302065, 3000105605, 4200147847, 21000739235]

約数ペア:

[(1, 21000739235), (5, 4200147847), (7, 3000105605), (19, 1105302065), (35, 600021121), (49, 428586515), (95, 221060413), (133, 157900295), (245, 85717303), (343, 61226645), (665, 31580059), (931, 22557185), (1715, 12245329), (4655, 4511437), (6517, 3222455), (32585, 644491)]