21015555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1901}}^1$

素因数の和:1987

約数の個数: 32

約数和(自身を含む): 37248768

約数和(自身を除く): 16233213

約数列:

[1, 3, 5, 11, 15, 33, 55, 67, 165, 201, 335, 737, 1005, 1901, 2211, 3685, 5703, 9505, 11055, 20911, 28515, 62733, 104555, 127367, 313665, 382101, 636835, 1401037, 1910505, 4203111, 7005185, 21015555]

約数ペア:

[(1, 21015555), (3, 7005185), (5, 4203111), (11, 1910505), (15, 1401037), (33, 636835), (55, 382101), (67, 313665), (165, 127367), (201, 104555), (335, 62733), (737, 28515), (1005, 20911), (1901, 11055), (2211, 9505), (3685, 5703)]