21385988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{4621}}^1$

素因数の和:4727

約数の個数: 24

約数和(自身を含む): 40766040

約数和(自身を除く): 19380052

約数列:

[1, 2, 4, 13, 26, 52, 89, 178, 356, 1157, 2314, 4621, 4628, 9242, 18484, 60073, 120146, 240292, 411269, 822538, 1645076, 5346497, 10692994, 21385988]

約数ペア:

[(1, 21385988), (2, 10692994), (4, 5346497), (13, 1645076), (26, 822538), (52, 411269), (89, 240292), (178, 120146), (356, 60073), (1157, 18484), (2314, 9242), (4621, 4628)]