21377265

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15661}}^1$

素因数の和:15689

約数の個数: 32

約数和(自身を含む): 42099456

約数和(自身を除く): 20722191

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15661, 46983, 78305, 109627, 203593, 234915, 328881, 548135, 610779, 1017965, 1425151, 1644405, 3053895, 4275453, 7125755, 21377265]

約数ペア:

[(1, 21377265), (3, 7125755), (5, 4275453), (7, 3053895), (13, 1644405), (15, 1425151), (21, 1017965), (35, 610779), (39, 548135), (65, 328881), (91, 234915), (105, 203593), (195, 109627), (273, 78305), (455, 46983), (1365, 15661)]