21657051

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:313

約数の個数: 40

約数和(自身を含む): 35330064

約数和(自身を除く): 13673013

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 131, 157, 351, 393, 471, 1053, 1179, 1413, 1703, 2041, 3537, 4239, 5109, 6123, 10611, 12717, 15327, 18369, 20567, 45981, 55107, 61701, 137943, 165321, 185103, 267371, 555309, 802113, 1665927, 2406339, 7219017, 21657051]

約数ペア:

[(1, 21657051), (3, 7219017), (9, 2406339), (13, 1665927), (27, 802113), (39, 555309), (81, 267371), (117, 185103), (131, 165321), (157, 137943), (351, 61701), (393, 55107), (471, 45981), (1053, 20567), (1179, 18369), (1413, 15327), (1703, 12717), (2041, 10611), (3537, 6123), (4239, 5109)]