19520820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{9859}}^1$

素因数の和:9885

約数の個数: 72

約数和(自身を含む): 64602720

約数和(自身を除く): 45081900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 9859, 19718, 29577, 39436, 49295, 59154, 88731, 98590, 108449, 118308, 147885, 177462, 197180, 216898, 295770, 325347, 354924, 433796, 443655, 542245, 591540, 650694, 887310, 976041, 1084490, 1301388, 1626735, 1774620, 1952082, 2168980, 3253470, 3904164, 4880205, 6506940, 9760410, 19520820]

約数ペア:

[(1, 19520820), (2, 9760410), (3, 6506940), (4, 4880205), (5, 3904164), (6, 3253470), (9, 2168980), (10, 1952082), (11, 1774620), (12, 1626735), (15, 1301388), (18, 1084490), (20, 976041), (22, 887310), (30, 650694), (33, 591540), (36, 542245), (44, 443655), (45, 433796), (55, 354924), (60, 325347), (66, 295770), (90, 216898), (99, 197180), (110, 177462), (132, 147885), (165, 118308), (180, 108449), (198, 98590), (220, 88731), (330, 59154), (396, 49295), (495, 39436), (660, 29577), (990, 19718), (1980, 9859)]