21482630

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{643}}^1$

素因数の和:920

約数の個数: 32

約数和(自身を含む): 41870304

約数和(自身を除く): 20387674

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 257, 514, 643, 1285, 1286, 2570, 3215, 3341, 6430, 6682, 8359, 16705, 16718, 33410, 41795, 83590, 165251, 330502, 826255, 1652510, 2148263, 4296526, 10741315, 21482630]

約数ペア:

[(1, 21482630), (2, 10741315), (5, 4296526), (10, 2148263), (13, 1652510), (26, 826255), (65, 330502), (130, 165251), (257, 83590), (514, 41795), (643, 33410), (1285, 16718), (1286, 16705), (2570, 8359), (3215, 6682), (3341, 6430)]