20420953

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{2897}}^1$

素因数の和:2976

約数の個数: 16

約数和(自身を含む): 25038720

約数和(自身を除く): 4617767

約数列:

[1, 7, 19, 53, 133, 371, 1007, 2897, 7049, 20279, 55043, 153541, 385301, 1074787, 2917279, 20420953]

約数ペア:

[(1, 20420953), (7, 2917279), (19, 1074787), (53, 385301), (133, 153541), (371, 55043), (1007, 20279), (2897, 7049)]