20754580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13477}}^1$

素因数の和:13504

約数の個数: 48

約数和(自身を含む): 54343296

約数和(自身を除く): 33588716

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13477, 26954, 53908, 67385, 94339, 134770, 148247, 188678, 269540, 296494, 377356, 471695, 592988, 741235, 943390, 1037729, 1482470, 1886780, 2075458, 2964940, 4150916, 5188645, 10377290, 20754580]

約数ペア:

[(1, 20754580), (2, 10377290), (4, 5188645), (5, 4150916), (7, 2964940), (10, 2075458), (11, 1886780), (14, 1482470), (20, 1037729), (22, 943390), (28, 741235), (35, 592988), (44, 471695), (55, 377356), (70, 296494), (77, 269540), (110, 188678), (140, 148247), (154, 134770), (220, 94339), (308, 67385), (385, 53908), (770, 26954), (1540, 13477)]