21034815

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19751}}^1$

素因数の和:19830

約数の個数: 16

約数和(自身を含む): 34131456

約数和(自身を除く): 13096641

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19751, 59253, 98755, 296265, 1402321, 4206963, 7011605, 21034815]

約数ペア:

[(1, 21034815), (3, 7011605), (5, 4206963), (15, 1402321), (71, 296265), (213, 98755), (355, 59253), (1065, 19751)]