21018764

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{619}}^1\times {\mathrm{653}}^1$

素因数の和:1289

約数の個数: 24

約数和(自身を含む): 39737040

約数和(自身を除く): 18718276

約数列:

[1, 2, 4, 13, 26, 52, 619, 653, 1238, 1306, 2476, 2612, 8047, 8489, 16094, 16978, 32188, 33956, 404207, 808414, 1616828, 5254691, 10509382, 21018764]

約数ペア:

[(1, 21018764), (2, 10509382), (4, 5254691), (13, 1616828), (26, 808414), (52, 404207), (619, 33956), (653, 32188), (1238, 16978), (1306, 16094), (2476, 8489), (2612, 8047)]