21148780

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{3931}}^1$

素因数の和:4209

約数の個数: 24

約数和(自身を含む): 44588880

約数和(自身を除く): 23440100

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 3931, 5380, 7862, 15724, 19655, 39310, 78620, 1057439, 2114878, 4229756, 5287195, 10574390, 21148780]

約数ペア:

[(1, 21148780), (2, 10574390), (4, 5287195), (5, 4229756), (10, 2114878), (20, 1057439), (269, 78620), (538, 39310), (1076, 19655), (1345, 15724), (2690, 7862), (3931, 5380)]