21381015

素因数分解:

$3^1\times 5^1\times {\mathrm{307}}^1\times {\mathrm{4643}}^1$

素因数の和:4958

約数の個数: 16

約数和(自身を含む): 34328448

約数和(自身を除く): 12947433

約数列:

[1, 3, 5, 15, 307, 921, 1535, 4605, 4643, 13929, 23215, 69645, 1425401, 4276203, 7127005, 21381015]

約数ペア:

[(1, 21381015), (3, 7127005), (5, 4276203), (15, 1425401), (307, 69645), (921, 23215), (1535, 13929), (4605, 4643)]