21639191

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:183

約数の個数: 32

約数和(自身を含む): 27287040

約数和(自身を除く): 5647849

約数列:

[1, 7, 29, 37, 43, 67, 203, 259, 301, 469, 1073, 1247, 1591, 1943, 2479, 2881, 7511, 8729, 11137, 13601, 17353, 20167, 46139, 71891, 83549, 106597, 322973, 503237, 584843, 746179, 3091313, 21639191]

約数ペア:

[(1, 21639191), (7, 3091313), (29, 746179), (37, 584843), (43, 503237), (67, 322973), (203, 106597), (259, 83549), (301, 71891), (469, 46139), (1073, 20167), (1247, 17353), (1591, 13601), (1943, 11137), (2479, 8729), (2881, 7511)]