21215847

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{167}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 31352832

約数和(自身を除く): 10136985

約数列:

[1, 3, 17, 47, 51, 53, 141, 159, 167, 501, 799, 901, 2397, 2491, 2703, 2839, 7473, 7849, 8517, 8851, 23547, 26553, 42347, 127041, 133433, 150467, 400299, 415997, 451401, 1247991, 7071949, 21215847]

約数ペア:

[(1, 21215847), (3, 7071949), (17, 1247991), (47, 451401), (51, 415997), (53, 400299), (141, 150467), (159, 133433), (167, 127041), (501, 42347), (799, 26553), (901, 23547), (2397, 8851), (2491, 8517), (2703, 7849), (2839, 7473)]