21208715

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{13297}}^1$

素因数の和:13342

約数の個数: 16

約数和(自身を含む): 28723680

約数和(自身を除く): 7514965

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 13297, 66485, 146267, 385613, 731335, 1928065, 4241743, 21208715]

約数ペア:

[(1, 21208715), (5, 4241743), (11, 1928065), (29, 731335), (55, 385613), (145, 146267), (319, 66485), (1595, 13297)]