21785439

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{163}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 11276961

約数列:

[1, 3, 13, 23, 39, 69, 149, 163, 299, 447, 489, 897, 1937, 2119, 3427, 3749, 5811, 6357, 10281, 11247, 24287, 44551, 48737, 72861, 133653, 146211, 315731, 558601, 947193, 1675803, 7261813, 21785439]

約数ペア:

[(1, 21785439), (3, 7261813), (13, 1675803), (23, 947193), (39, 558601), (69, 315731), (149, 146211), (163, 133653), (299, 72861), (447, 48737), (489, 44551), (897, 24287), (1937, 11247), (2119, 10281), (3427, 6357), (3749, 5811)]