20109789

素因数分解:

$3^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1223}}^1$

素因数の和:1271

約数の個数: 40

約数和(自身を含む): 35544960

約数和(自身を除く): 15435171

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 261, 567, 609, 783, 1223, 1827, 2349, 3669, 5481, 8561, 11007, 16443, 25683, 33021, 35467, 77049, 99063, 106401, 231147, 248269, 319203, 693441, 744807, 957609, 2234421, 2872827, 6703263, 20109789]

約数ペア:

[(1, 20109789), (3, 6703263), (7, 2872827), (9, 2234421), (21, 957609), (27, 744807), (29, 693441), (63, 319203), (81, 248269), (87, 231147), (189, 106401), (203, 99063), (261, 77049), (567, 35467), (609, 33021), (783, 25683), (1223, 16443), (1827, 11007), (2349, 8561), (3669, 5481)]