21495921

素因数分解:

$3^1\times {\mathrm{83}}^1\times {\mathrm{131}}^1\times {\mathrm{659}}^1$

素因数の和:876

約数の個数: 16

約数和(自身を含む): 29272320

約数和(自身を除く): 7776399

約数列:

[1, 3, 83, 131, 249, 393, 659, 1977, 10873, 32619, 54697, 86329, 164091, 258987, 7165307, 21495921]

約数ペア:

[(1, 21495921), (3, 7165307), (83, 258987), (131, 164091), (249, 86329), (393, 54697), (659, 32619), (1977, 10873)]