21671405

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{26921}}^1$

素因数の和:26956

約数の個数: 16

約数和(自身を含む): 31014144

約数和(自身を除く): 9342739

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 26921, 134605, 188447, 619183, 942235, 3095915, 4334281, 21671405]

約数ペア:

[(1, 21671405), (5, 4334281), (7, 3095915), (23, 942235), (35, 619183), (115, 188447), (161, 134605), (805, 26921)]