21639527

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{211}}^1$

素因数の和:268

約数の個数: 32

約数和(自身を含む): 28492800

約数和(自身を除く): 6853273

約数列:

[1, 7, 13, 23, 49, 91, 161, 211, 299, 343, 637, 1127, 1477, 2093, 2743, 4459, 4853, 7889, 10339, 14651, 19201, 33971, 63089, 72373, 102557, 134407, 237797, 441623, 940849, 1664579, 3091361, 21639527]

約数ペア:

[(1, 21639527), (7, 3091361), (13, 1664579), (23, 940849), (49, 441623), (91, 237797), (161, 134407), (211, 102557), (299, 72373), (343, 63089), (637, 33971), (1127, 19201), (1477, 14651), (2093, 10339), (2743, 7889), (4459, 4853)]