21856565

素因数分解:

$5^1\times {\mathrm{73}}^1\times {\mathrm{233}}^1\times {\mathrm{257}}^1$

素因数の和:568

約数の個数: 16

約数和(自身を含む): 26805168

約数和(自身を除く): 4948603

約数列:

[1, 5, 73, 233, 257, 365, 1165, 1285, 17009, 18761, 59881, 85045, 93805, 299405, 4371313, 21856565]

約数ペア:

[(1, 21856565), (5, 4371313), (73, 299405), (233, 93805), (257, 85045), (365, 59881), (1165, 18761), (1285, 17009)]