21388718

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1493}}^1$

素因数の和:1556

約数の個数: 32

約数和(自身を含む): 37648800

約数和(自身を除く): 16260082

約数列:

[1, 2, 13, 19, 26, 29, 38, 58, 247, 377, 494, 551, 754, 1102, 1493, 2986, 7163, 14326, 19409, 28367, 38818, 43297, 56734, 86594, 368771, 562861, 737542, 822643, 1125722, 1645286, 10694359, 21388718]

約数ペア:

[(1, 21388718), (2, 10694359), (13, 1645286), (19, 1125722), (26, 822643), (29, 737542), (38, 562861), (58, 368771), (247, 86594), (377, 56734), (494, 43297), (551, 38818), (754, 28367), (1102, 19409), (1493, 14326), (2986, 7163)]