20780235

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1609}}^1$

素因数の和:1668

約数の個数: 48

約数和(自身を含む): 42194880

約数和(自身を除く): 21414645

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1609, 1845, 2583, 4305, 4827, 8045, 11263, 12915, 14481, 24135, 33789, 56315, 65969, 72405, 101367, 168945, 197907, 329845, 461783, 506835, 593721, 989535, 1385349, 2308915, 2968605, 4156047, 6926745, 20780235]

約数ペア:

[(1, 20780235), (3, 6926745), (5, 4156047), (7, 2968605), (9, 2308915), (15, 1385349), (21, 989535), (35, 593721), (41, 506835), (45, 461783), (63, 329845), (105, 197907), (123, 168945), (205, 101367), (287, 72405), (315, 65969), (369, 56315), (615, 33789), (861, 24135), (1435, 14481), (1609, 12915), (1845, 11263), (2583, 8045), (4305, 4827)]