21152719

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{1787}}^1$

素因数の和:1902

約数の個数: 16

約数和(自身を含む): 25747200

約数和(自身を除く): 4594481

約数列:

[1, 7, 19, 89, 133, 623, 1691, 1787, 11837, 12509, 33953, 159043, 237671, 1113301, 3021817, 21152719]

約数ペア:

[(1, 21152719), (7, 3021817), (19, 1113301), (89, 237671), (133, 159043), (623, 33953), (1691, 12509), (1787, 11837)]