19910457

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 34369920

約数和(自身を除く): 14459463

約数列:

[1, 3, 7, 9, 21, 53, 63, 67, 89, 159, 201, 267, 371, 469, 477, 603, 623, 801, 1113, 1407, 1869, 3339, 3551, 4221, 4717, 5607, 5963, 10653, 14151, 17889, 24857, 31959, 33019, 41741, 42453, 53667, 74571, 99057, 125223, 223713, 297171, 316039, 375669, 948117, 2212273, 2844351, 6636819, 19910457]

約数ペア:

[(1, 19910457), (3, 6636819), (7, 2844351), (9, 2212273), (21, 948117), (53, 375669), (63, 316039), (67, 297171), (89, 223713), (159, 125223), (201, 99057), (267, 74571), (371, 53667), (469, 42453), (477, 41741), (603, 33019), (623, 31959), (801, 24857), (1113, 17889), (1407, 14151), (1869, 10653), (3339, 5963), (3551, 5607), (4221, 4717)]