21311961

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{653}}^1$

素因数の和:733

約数の個数: 32

約数和(自身を含む): 33149952

約数和(自身を除く): 11837991

約数列:

[1, 3, 11, 23, 33, 43, 69, 129, 253, 473, 653, 759, 989, 1419, 1959, 2967, 7183, 10879, 15019, 21549, 28079, 32637, 45057, 84237, 165209, 308869, 495627, 645817, 926607, 1937451, 7103987, 21311961]

約数ペア:

[(1, 21311961), (3, 7103987), (11, 1937451), (23, 926607), (33, 645817), (43, 495627), (69, 308869), (129, 165209), (253, 84237), (473, 45057), (653, 32637), (759, 28079), (989, 21549), (1419, 15019), (1959, 10879), (2967, 7183)]