16563771

素因数分解:

$3^4\times 7^1\times {\mathrm{131}}^1\times {\mathrm{223}}^1$

素因数の和:373

約数の個数: 40

約数和(自身を含む): 28621824

約数和(自身を除く): 12058053

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 131, 189, 223, 393, 567, 669, 917, 1179, 1561, 2007, 2751, 3537, 4683, 6021, 8253, 10611, 14049, 18063, 24759, 29213, 42147, 74277, 87639, 126441, 204491, 262917, 613473, 788751, 1840419, 2366253, 5521257, 16563771]

約数ペア:

[(1, 16563771), (3, 5521257), (7, 2366253), (9, 1840419), (21, 788751), (27, 613473), (63, 262917), (81, 204491), (131, 126441), (189, 87639), (223, 74277), (393, 42147), (567, 29213), (669, 24759), (917, 18063), (1179, 14049), (1561, 10611), (2007, 8253), (2751, 6021), (3537, 4683)]