21090517

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{1297}}^1$

素因数の和:1428

約数の個数: 16

約数和(自身を含む): 25420032

約数和(自身を除く): 4329515

約数列:

[1, 7, 23, 101, 161, 707, 1297, 2323, 9079, 16261, 29831, 130997, 208817, 916979, 3012931, 21090517]

約数ペア:

[(1, 21090517), (7, 3012931), (23, 916979), (101, 208817), (161, 130997), (707, 29831), (1297, 16261), (2323, 9079)]