21509384

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{206821}}^1$

素因数の和:206840

約数の個数: 16

約数和(自身を含む): 43432620

約数和(自身を除く): 21923236

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 206821, 413642, 827284, 1654568, 2688673, 5377346, 10754692, 21509384]

約数ペア:

[(1, 21509384), (2, 10754692), (4, 5377346), (8, 2688673), (13, 1654568), (26, 827284), (52, 413642), (104, 206821)]