21480815

素因数分解:

$5^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1\times {\mathrm{271}}^1$

素因数の和:550

約数の個数: 16

約数和(自身を含む): 26320896

約数和(自身を除く): 4840081

約数列:

[1, 5, 83, 191, 271, 415, 955, 1355, 15853, 22493, 51761, 79265, 112465, 258805, 4296163, 21480815]

約数ペア:

[(1, 21480815), (5, 4296163), (83, 258805), (191, 112465), (271, 79265), (415, 51761), (955, 22493), (1355, 15853)]