21981159

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{419}}^1$

素因数の和:524

約数の個数: 32

約数和(自身を含む): 34272000

約数和(自身を除く): 12290841

約数列:

[1, 3, 9, 27, 29, 67, 87, 201, 261, 419, 603, 783, 1257, 1809, 1943, 3771, 5829, 11313, 12151, 17487, 28073, 36453, 52461, 84219, 109359, 252657, 328077, 757971, 814117, 2442351, 7327053, 21981159]

約数ペア:

[(1, 21981159), (3, 7327053), (9, 2442351), (27, 814117), (29, 757971), (67, 328077), (87, 252657), (201, 109359), (261, 84219), (419, 52461), (603, 36453), (783, 28073), (1257, 17487), (1809, 12151), (1943, 11313), (3771, 5829)]