28687905

素因数分解:

$3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:199

約数の個数: 64

約数和(自身を含む): 53706240

約数和(自身を除く): 25018335

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 71, 73, 123, 135, 205, 213, 219, 355, 365, 369, 615, 639, 657, 1065, 1095, 1107, 1845, 1917, 1971, 2911, 2993, 3195, 3285, 5183, 5535, 8733, 8979, 9585, 9855, 14555, 14965, 15549, 25915, 26199, 26937, 43665, 44895, 46647, 77745, 78597, 80811, 130995, 134685, 139941, 212503, 233235, 392985, 404055, 637509, 699705, 1062515, 1912527, 3187545, 5737581, 9562635, 28687905]

約数ペア:

[(1, 28687905), (3, 9562635), (5, 5737581), (9, 3187545), (15, 1912527), (27, 1062515), (41, 699705), (45, 637509), (71, 404055), (73, 392985), (123, 233235), (135, 212503), (205, 139941), (213, 134685), (219, 130995), (355, 80811), (365, 78597), (369, 77745), (615, 46647), (639, 44895), (657, 43665), (1065, 26937), (1095, 26199), (1107, 25915), (1845, 15549), (1917, 14965), (1971, 14555), (2911, 9855), (2993, 9585), (3195, 8979), (3285, 8733), (5183, 5535)]