21385215

素因数分解:

$3^6\times 5^1\times {\mathrm{5867}}^1$

素因数の和:5890

約数の個数: 28

約数和(自身を含む): 38482344

約数和(自身を除く): 17097129

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 3645, 5867, 17601, 29335, 52803, 88005, 158409, 264015, 475227, 792045, 1425681, 2376135, 4277043, 7128405, 21385215]

約数ペア:

[(1, 21385215), (3, 7128405), (5, 4277043), (9, 2376135), (15, 1425681), (27, 792045), (45, 475227), (81, 264015), (135, 158409), (243, 88005), (405, 52803), (729, 29335), (1215, 17601), (3645, 5867)]