20655921

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{541}}^1$

素因数の和:657

約数の個数: 32

約数和(自身を含む): 32780160

約数和(自身を除く): 12124239

約数列:

[1, 3, 11, 13, 33, 39, 89, 143, 267, 429, 541, 979, 1157, 1623, 2937, 3471, 5951, 7033, 12727, 17853, 21099, 38181, 48149, 77363, 144447, 232089, 529639, 625937, 1588917, 1877811, 6885307, 20655921]

約数ペア:

[(1, 20655921), (3, 6885307), (11, 1877811), (13, 1588917), (33, 625937), (39, 529639), (89, 232089), (143, 144447), (267, 77363), (429, 48149), (541, 38181), (979, 21099), (1157, 17853), (1623, 12727), (2937, 7033), (3471, 5951)]