21260805

素因数分解:

$3^1\times 5^1\times {\mathrm{787}}^1\times {\mathrm{1801}}^1$

素因数の和:2596

約数の個数: 16

約数和(自身を含む): 34079424

約数和(自身を除く): 12818619

約数列:

[1, 3, 5, 15, 787, 1801, 2361, 3935, 5403, 9005, 11805, 27015, 1417387, 4252161, 7086935, 21260805]

約数ペア:

[(1, 21260805), (3, 7086935), (5, 4252161), (15, 1417387), (787, 27015), (1801, 11805), (2361, 9005), (3935, 5403)]