21495213

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13967}}^1$

素因数の和:13998

約数の個数: 20

約数和(自身を含む): 33802560

約数和(自身を除く): 12307347

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13967, 41901, 125703, 265373, 377109, 796119, 1131327, 2388357, 7165071, 21495213]

約数ペア:

[(1, 21495213), (3, 7165071), (9, 2388357), (19, 1131327), (27, 796119), (57, 377109), (81, 265373), (171, 125703), (513, 41901), (1539, 13967)]