21000337491

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{223}}^1\times {\mathrm{66931}}^1$

素因数の和:67231

約数の個数: 32

約数和(自身を含む): 32624263168

約数和(自身を除く): 11623925677

約数列:

[1, 3, 7, 21, 67, 201, 223, 469, 669, 1407, 1561, 4683, 14941, 44823, 66931, 104587, 200793, 313761, 468517, 1405551, 4484377, 13453131, 14925613, 31390639, 44776839, 94171917, 104479291, 313437873, 1000016071, 3000048213, 7000112497, 21000337491]

約数ペア:

[(1, 21000337491), (3, 7000112497), (7, 3000048213), (21, 1000016071), (67, 313437873), (201, 104479291), (223, 94171917), (469, 44776839), (669, 31390639), (1407, 14925613), (1561, 13453131), (4683, 4484377), (14941, 1405551), (44823, 468517), (66931, 313761), (104587, 200793)]