31831785

素因数分解:

$3^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:138

約数の個数: 64

約数和(自身を含む): 59512320

約数和(自身を除く): 27680535

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 71, 81, 123, 135, 205, 213, 243, 355, 369, 405, 615, 639, 729, 1065, 1107, 1215, 1845, 1917, 2187, 2911, 3195, 3321, 3645, 5535, 5751, 8733, 9585, 9963, 10935, 14555, 16605, 17253, 26199, 28755, 29889, 43665, 49815, 51759, 78597, 86265, 89667, 130995, 149445, 155277, 235791, 258795, 392985, 448335, 707373, 776385, 1178955, 2122119, 3536865, 6366357, 10610595, 31831785]

約数ペア:

[(1, 31831785), (3, 10610595), (5, 6366357), (9, 3536865), (15, 2122119), (27, 1178955), (41, 776385), (45, 707373), (71, 448335), (81, 392985), (123, 258795), (135, 235791), (205, 155277), (213, 149445), (243, 130995), (355, 89667), (369, 86265), (405, 78597), (615, 51759), (639, 49815), (729, 43665), (1065, 29889), (1107, 28755), (1215, 26199), (1845, 17253), (1917, 16605), (2187, 14555), (2911, 10935), (3195, 9963), (3321, 9585), (3645, 8733), (5535, 5751)]