20787501

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{983}}^1$

素因数の和:1065

約数の個数: 32

約数和(自身を含む): 34007040

約数和(自身を除く): 13219539

約数列:

[1, 3, 7, 19, 21, 53, 57, 133, 159, 371, 399, 983, 1007, 1113, 2949, 3021, 6881, 7049, 18677, 20643, 21147, 52099, 56031, 130739, 156297, 364693, 392217, 989881, 1094079, 2969643, 6929167, 20787501]

約数ペア:

[(1, 20787501), (3, 6929167), (7, 2969643), (19, 1094079), (21, 989881), (53, 392217), (57, 364693), (133, 156297), (159, 130739), (371, 56031), (399, 52099), (983, 21147), (1007, 20643), (1113, 18677), (2949, 7049), (3021, 6881)]