21678645

素因数分解:

$3^1\times 5^1\times {\mathrm{271}}^1\times {\mathrm{5333}}^1$

素因数の和:5612

約数の個数: 16

約数和(自身を含む): 34820352

約数和(自身を除く): 13141707

約数列:

[1, 3, 5, 15, 271, 813, 1355, 4065, 5333, 15999, 26665, 79995, 1445243, 4335729, 7226215, 21678645]

約数ペア:

[(1, 21678645), (3, 7226215), (5, 4335729), (15, 1445243), (271, 79995), (813, 26665), (1355, 15999), (4065, 5333)]